Deliblatska Peščara
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Deliblato Sands ( sr, Делиблатска пешчара, Deliblatska peščara; hu, Delibláti-homokpuszta) is a large
sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of s ...
area covering around of ground in
Vojvodina Vojvodina ( sr-Cyrl, Војводина}), officially the Autonomous Province of Vojvodina, is an autonomous province that occupies the northernmost part of Serbia. It lies within the Pannonian Basin, bordered to the south by the national capital ...
province,
Serbia Serbia (, ; Serbian language, Serbian: , , ), officially the Republic of Serbia (Serbian language, Serbian: , , ), is a landlocked country in Southeast Europe, Southeastern and Central Europe, situated at the crossroads of the Pannonian Bas ...
. It is located in southern
Banat Banat (, ; hu, Bánság; sr, Банат, Banat) is a geographical and historical region that straddles Central and Eastern Europe and which is currently divided among three countries: the eastern part lies in western Romania (the counties of T ...
, situated between the river
Danube The Danube ( ; ) is a river that was once a long-standing frontier of the Roman Empire and today connects 10 European countries, running through their territories or being a border. Originating in Germany, the Danube flows southeast for , pa ...
and the southwestern slopes of the
Carpathian Mountains The Carpathian Mountains or Carpathians () are a range of mountains forming an arc across Central Europe. Roughly long, it is the third-longest European mountain range after the Urals at and the Scandinavian Mountains at . The range stretches ...
. The sands are named after the village of
Deliblato Deliblato (; ro, Deliblata) is a village in Serbia, situated in the Kovin municipality in the Vojvodina province. The village has a total population of 3,498 (2002 census), with a Serb ethnic majority and a Romanian minority. The Deliblatska Pe ...
, in the municipality of
Kovin Kovin (, hu, Kevevára) is a town and municipality located in the South Banat District of the autonomous province of Vojvodina, Serbia. The town has a population of 13,515, while the municipality has 33,722 inhabitants. In Romanian, the tow ...
. Its main masses are elliptical shaped hills with steppe grassland plains and steppe forests. The Deliblato Sands is the largest sandy terrain in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
, once part of a vast prehistoric
desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...
, having originated from the withdrawal of the
Pannonian Sea The Pannonian Sea was a shallow ancient lake, where the Pannonian Basin in Central Europe is now. The Pannonian Sea existed from about 10 Ma (million years ago) until 1 Ma, during the Miocene and Pliocene epochs, when marine sediments were dep ...
. They are home to many
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
species of
plant Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclud ...
s and
animal Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motilit ...
s which are rare or
endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...
in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
and globally. Due to its forest and surroundings, it was declared a
special nature reserve Special or specials may refer to: Policing * Specials, Ulster Special Constabulary, the Northern Ireland police force * Specials, Special Constable, an auxiliary, volunteer, or temporary; police worker or police officer Literature * Specials ( ...
. On a national level, it represents a natural asset of special importance falling under protection category I. It is referred to as the "European
Sahara , photo = Sahara real color.jpg , photo_caption = The Sahara taken by Apollo 17 astronauts, 1972 , map = , map_image = , location = , country = , country1 = , ...
", or the " Old Continent's oldest desert".


Geography

The Deliblato is an expanse of
Aeolian processes Aeolian processes, also spelled eolian, pertain to wind activity in the study of geology and weather and specifically to the wind's ability to shape the surface of the Earth (or other planets). Winds may erode, transport, and deposit materials ...
with significant
dune A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, f ...
-like relief made of powerful sandy deposits. It is a unique feature in this part of the world as the largest exemplar of the true sandy relief. Dunes are tall. Southeast of the sands is the Kraljevac lake, one of the reservoirs formed around the edges of the region, in an effort to stop moving of the sand. There are floating peat islands on the lake's surface, where numerous waterfowls are nesting.


Labudovo Okno

Southern section of the sands, which reaches the Danube, is known as the Labudovo Okno. It has been declared a
Ramsar wetland The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar sites (wetlands). It is also known as the Convention on Wetlands. It i ...
in 2006. The section covers an area of some and includes marshes, ponds, meanders, river islands of Žilovo, Čibuklija and Zavojska Ada, meanders of the
Karaš The Karaš (in Serbian, also Cyrillic: Караш) or Caraș (in Romanian) is a long river in the Banat region of Vojvodina, Serbia and Romania and a left tributary of the Danube. The Karaš drains an area of and although it has been channele ...
river and the submerged mouth of the
Nera Nera may refer to: People * Nera Smajic (born 1984), Bosnian-born Swedish footballer * Nera Stipičević (born 1983), Croatian actress * Nera White (1935–2016), American basketball player * André António Ribeiro Novais (born 1988), Portugue ...
into the Danube. It is one of the most important migratory birds habitats in Serbia.


Wildlife

The Deliblato Sands is rich in
flora Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. E ...
l diversity, it is home to 900 different species of
plants Plants are predominantly Photosynthesis, photosynthetic eukaryotes of the Kingdom (biology), kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all curr ...
which many are considered by international standards rare or
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the
Pannonian Basin The Pannonian Basin, or Carpathian Basin, is a large Sedimentary basin, basin situated in south-east Central Europe. The Geomorphology, geomorphological term Pannonian Plain is more widely used for roughly the same region though with a somewh ...
. Regions of similar terrain across
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
have been cultivated,
forest A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...
ed or otherwise altered, while Deliblato Sands has largely remained untouched. Some of the endangered and endemic species of flora include the Banat peony, steppe peony, Pančić wormwood,
bulrush Bulrush is a vernacular name for several large wetland grass-like plants *Sedge family (Cyperaceae): **''Cyperus'' **''Scirpus'' **'' Blysmus'' **''Bolboschoenus'' **''Scirpoides'' **''Isolepis'' **''Schoenoplectus'' **''Trichophorum'' *Typhacea ...
and dwarf Russian almond. Twenty different species of
Orchidaceae Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering ...
grow in this area. Tree species used for the immobilization of the moving sand include
black locust ''Robinia pseudoacacia'', commonly known in its native territory as black locust, is a medium-sized hardwood deciduous tree, belonging to the tribe Robinieae of the legume family Fabaceae. It is endemic to a few small areas of the United States ...
, black pine,
Scots pine ''Pinus sylvestris'', the Scots pine (UK), Scotch pine (US) or Baltic pine, is a species of tree in the pine family Pinaceae that is native to Eurasia. It can readily be identified by its combination of fairly short, blue-green leaves and orang ...
and various deciduous species. A total of 200 animal species inhabits the sands. Rare
fauna Fauna is all of the animal life present in a particular region or time. The corresponding term for plants is ''flora'', and for fungi, it is '' funga''. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoo ...
include the
desert ant ''Cataglyphis'' is a genus of ant, desert ants, in the subfamily Formicinae. Its most famous species is ''C. bicolor'', the Sahara Desert ant, which runs on hot sand to find insects that died of heat exhaustion, and can, like other several oth ...
,
antlion The antlions are a group of about 2,000 species of insect in the neuropteran family Myrmeleontidae. They are known for the predatory habits of their larvae, which mostly dig pits to trap passing ants or other prey. In North America, the larvae ...
,
mole rat Mole-rat or mole rat can refer to several groups of burrowing Old World rodents: * Bathyergidae, a family of about 20 hystricognath species in six genera from Africa also called blesmols. *'' Heterocephalus glaber'', the naked mole-rat. * Spalacid ...
, and
steppe polecat The steppe polecat (''Mustela eversmanii''), also known as the white or masked polecat, is a species of mustelid native to Central and Eastern Europe and Central Asia. It is listed as Least Concern on the IUCN Red List because of its wide distrib ...
. The main source of food for some endangered birds of prey, such as the
saker falcon The saker falcon (''Falco cherrug'') is a large species of falcon. This species breeds from central Europe eastwards across the Palearctic to Manchuria. It is mainly migratory except in the southernmost parts of its range, wintering in Ethiopia ...
,
eastern imperial eagle The eastern imperial eagle (''Aquila heliaca'') is a large bird of prey that breeds in southeastern Europe and extensively through West and Central Asia. Most populations are migratory and winter in northeastern Africa, the Middle East and South ...
and
lesser spotted eagle The lesser spotted eagle (''Clanga pomarina'') is a large Eastern European bird of prey. Like all typical eagles, it belongs to the family Accipitridae. The typical eagles are often united with the buteos, sea eagles, and other more heavy-set Acc ...
, are
ground squirrel Ground squirrels are members of the squirrel family of rodents (Sciuridae), which generally live on or in the ground, rather than trees. The term is most often used for the medium-sized ground squirrels, as the larger ones are more commonly known ...
s that live in large open grass fields; hence such areas are necessary for their survival. Other noted animals are the
wolf The wolf (''Canis lupus''; : wolves), also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, and gray wolves, as popularly u ...
,
deer Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the reindeer ...
,
roe deer The roe deer (''Capreolus capreolus''), also known as the roe, western roe deer, or European roe, is a species of deer. The male of the species is sometimes referred to as a roebuck. The roe is a small deer, reddish and grey-brown, and well-adapt ...
and
boar The wild boar (''Sus scrofa''), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species is no ...
.


Human history

Remains from the
Bronze Age The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second pri ...
were discovered in the locality of
Židovar Židovar is an archeological site and settlement near Vršac, Serbia. History The earliest archeological findings date from the early Bronze Age and are followed by middle Bronze Age relics of the Vatin culture and late Bronze Age remains of the ...
. Other localities (Đurica, Grebenac, Veliki Grad, Mali Grad) contain remains of the habitation from the 13th century BC to the 1500s and 1600s. Roman period is represented with the trench near
Kovin Kovin (, hu, Kevevára) is a town and municipality located in the South Banat District of the autonomous province of Vojvodina, Serbia. The town has a population of 13,515, while the municipality has 33,722 inhabitants. In Romanian, the tow ...
(''Rimski šanac''). In 1789, Austrian authorities, which controlled the area at the time, dispatched forest engineer Franz Bachofen from
Timișoara ), City of Roses ( ro, Orașul florilor), City of Parks ( ro, Orașul parcurilor) , image_map = Timisoara jud Timis.svg , map_caption = Location in Timiș County , pushpin_map = Romania#Europe , pushpin_ ...
to conduct measurements of the sands and complies a report on how to "tame" the sand. At the time, strong winds and storms would carry the sand from Deliblato all the way to
Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...
and Pest. According to the popular myth, Austrian empress
Maria Theresa Maria Theresa Walburga Amalia Christina (german: Maria Theresia; 13 May 1717 – 29 November 1780) was ruler of the Habsburg dominions from 1740 until her death in 1780, and the only woman to hold the position ''suo jure'' (in her own right). ...
ordered for the fixing of Deliblato after wind brought some sand into her plate while she was eating soup. After a decade of work, Bachofen reported that the sands cover an area of , out of which is covered with loose, free sand. In order to immobilize the sand, Bachofer drafter a forestation plan, which was accepted in 1818. Since then, almost of the sands was forested, but also got burned in time in three catastrophic fires caused by the human negligence. The sand was used as a hideout by the
Yugoslav Partisans The Yugoslav Partisans,Serbo-Croatian, Macedonian, Slovene: , or the National Liberation Army, sh-Latn-Cyrl, Narodnooslobodilačka vojska (NOV), Народноослободилачка војска (НОВ); mk, Народноослобод ...
during
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. They used to build base camps and dugouts where they were hiding after the anti-German actions. Out of numerous temporary hideouts, only one is preserved today. It was an improvised hospital at the locality Čardak. A monument dedicated to the Jews who were transported from Belgrade and executed in the sands by the Germans during the occupation, is also located here. After the war, numerous
Youth work actions Youth work actions (Serbo-Croatian: ''Omladinske radne akcije'', often abbreviated to ''ORA'', Slovenian: ''Mladinske delovne akcije'') were organized voluntary labor activities of young people in the Socialist Federal Republic of Yugoslavia. The ...
were organized in the sands. Until the late 1980s, organized and planned works included immobilization of the sand, formation of the firefighting paths and paving the roads, while the "Čardak" settlement for the participants of the actions was constructed. It was envisioned as a touristic and sports complex in the future, but it was neglected in time and since the 1990s became a settlement for the
Yugoslav wars The Yugoslav Wars were a series of separate but related#Naimark, Naimark (2003), p. xvii. ethnic conflicts, wars of independence, and Insurgency, insurgencies that took place in the Socialist Federal Republic of Yugoslavia, SFR Yugoslavia from ...
refugees. The greenery in the region was almost completely destroyed in the devastating 1996 fire. "Čardak" was then adapted into the educational-recreational center. In March 2020, the provincial administration decided to use it as the camp for the Middle Eastern migrants, who at the time numbered 8,500, scattered in 17 camps all over Serbia. Only those from Vojvodina (several hundreds) were to be placed here. Hundreds of local denizens protested, joined by the representatives of the local administration. Though claiming the decision was only temporary (2 months at most), the province revoked it a week later, declaring it the
COVID-19 Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was COVID-19 pandemic in Hubei, identified in Wuhan, China, in December ...
quarantine instead. In total there are some 800 households, weekend-houses or rooms in excursion complexes in the sands. This includes a weekend settlement with 20 bungalows, built by the former Glass Industry Pančevo, which is today left to the elements. The chronic problem in the sands is the lack of drinking water.


Characteristics

Extensive
grapevine ''Vitis'' (grapevine) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, b ...
cultivation spread while the sands were part of the
Banat Military Frontier The Banat Military Frontier or simply Banat Frontier ( sr, Банатска крајина/Banatska krajina; ro, Granița militară Bănățeană) was a district of the Habsburg monarchy's Military Frontier located in the Banat region. It was for ...
, until 1873. It was said that "there was no house without a grapevine" at the time. There were also large vineyard plantations, like the Pálfi and Sauerwald at
Kajtasovo Kajtasovo () is a village in Serbia. It is situated in the Bela Crkva municipality, in the South Banat District, Vojvodina province. The village has a Serb ethnic majority (88.15%) and a population of 287 people (2002 census). Historical populat ...
, Emanuelovac at Dubovac, Wekerle at
Vladimirovac Vladimirovac () is a village in Serbia. It is situated in the Alibunar municipality, in the South Banat District, Vojvodina province. The village has a Serb ethnic majority and a population of 4,111 people (2002 census). Name In Serbian, the vi ...
,
Mramorak Mramorak (Serbian Cyrillic alphabet, Serbian Cyrillic: Мраморак) is a village in Serbia. It is situated in the Kovin municipality, in the South Banat District, Vojvodina province. The village has a Serb ethnic majority (71.79%) with a pr ...
Vineyards and the vineyard at Šušara. The
red grape This list of grape varieties includes cultivated grapes, whether used for wine, or eating as a table grape, fresh or dried (raisin, currant, sultana). For a complete list of all grape species including those unimportant to agriculture, see Viti ...
was dominant (varieties of ''Othello'', ''
Trollinger Trollinger, Schiava, or Vernatsch, is a red German wine, German/Italian wine List of grape varieties, grape variety that was likely first originally cultivated in the wine regions of South Tyrol wine, South Tyrol and Trentino, but today is almo ...
'', ''Sazodoš'' and ''Volovo Oko''), but also cultivated were the
white grape A grape is a fruit, botanically a berry (botany), berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non-Climacteric (botany), climacteric type of fruit, generally occurring in clusters. The cultivation of ...
(''White Othello'', ''Kozje Sise'') and the rose grape (''
Dinka The Dinka people ( din, Jiɛ̈ɛ̈ŋ) are a Nilotes, Nilotic ethnic group native to South Sudan with a sizable diaspora population abroad. The Dinka mostly live along the Nile, from Jonglei to Renk, South Sudan, Renk, in the region of Bahr el Gh ...
''). As the cultivation of vines on the sandy soil is an arduous work, many quit cultivation in time, leaving vast empty sand areas. Locality of
Devojački Bunar Devojački Bunar () is a small settlement in Serbia. It is situated in the Alibunar municipality, South Banat District, Vojvodina province. Officially, Devojački Bunar is not classified as a separate settlement, but as part of the town of Banatski ...
is situated in the northwestern corner of the sands. It is a popular excursion place which also includes the only wooden church in Vojvodina, dedicated to
Margaret the Virgin Margaret, known as Margaret of Antioch in the West, and as Saint Marina the Great Martyr ( grc-gre, Ἁγία Μαρίνα) in the East, is celebrated as a saint on 20 July in the Western Rite Orthodoxy, Roman Catholic Church and Anglicanism, o ...
, in Serbian known as the Fiery Maria, and an old ''dolap''. ''Dolap'' is a type of old water well, powered by animals, mostly horses or
oxen An ox ( : oxen, ), also known as a bullock (in BrE British English (BrE, en-GB, or BE) is, according to Oxford Dictionaries, "English as used in Great Britain, as distinct from that used elsewhere". More narrowly, it can refer spec ...
. The well at Devojački Bunar extracted water from the depth of . An artistic colony "Deliblatska Peščara" is organized annually. In decades, until 2019, 432 artists participated in workshops, producing thousands of works, out of which 1,288 were given to the town of
Pančevo Pančevo (Serbian Cyrillic: Панчево, ; german: Pantschowa; hu, Pancsova; ro, Panciova; sk, Pánčevo) is a city and the administrative center of the South Banat District in the autonomous province of Vojvodina, Serbia. It is located on ...
. Established in 1969, the colony is centered at Devojački Bunar.


In popular culture

The sands was used as a filming location for numerous international and Serbian movies: ''
Genghis Khan ''Chinggis Khaan'' ͡ʃʰiŋɡɪs xaːŋbr />Mongol script: ''Chinggis Qa(gh)an/ Chinggis Khagan'' , birth_name = Temüjin , successor = Tolui (as regent)Ögedei Khan , spouse = , issue = , house = Borjigin , ...
'' (1965), ''
I Even Met Happy Gypsies ''I Even Met Happy Gypsies'' is a 1967 Yugoslav film by Serbian director Aleksandar Petrović. Its original Serbian title is ''Skupljači perja'', which means ''The Feather Gatherers''. The film is centered on Romani people's life in a village ...
'' (1967), ''
It Rains in My Village ''It Rains in My Village'' ( sh, Biće skoro propast sveta, ) is a 1968 Yugoslav film by Serbian director Aleksandar Petrović, partly inspired by the novel Demons by Fyodor Dostoevsky. Plot A mentally challenged girl is defended by a young man ...
'' (1968), ''
Who's Singin' Over There? ''Who's Singin' Over There?'' ( sh, Ko to tamo peva) is a 1980 Yugoslav film written by Dušan Kovačević and directed by Slobodan Šijan. It is a dark comedy and features an ensemble cast. The film tells a story about a group of passengers trav ...
'' (1980), ''
The Elusive Summer of '68 ''The Elusive Summer of '68'' ( sh, Varljivo leto '68; sr-cyr, Варљиво лето '68) is a 1984 Yugoslav film directed by Goran Paskaljević. It depicts a summer dominated by protests, as seen from the point of view of a teenage boy in Y ...
'' (1984), ''
Battle of Kosovo The Battle of Kosovo ( tr, Kosova Savaşı; sr, Косовска битка) took place on 15 June 1389 between an army led by the Serbian Prince Lazar Hrebeljanović and an invading army of the Ottoman Empire under the command of Sultan ...
'' (1989), ''
The White Suit ''The White Suit'' () is a 1999 Serbian language film directed by Lazar Ristovski. It was a co-production between the United Kingdom and Federal Republic of Yugoslavia. It was Yugoslavia's official Best Foreign Language Film submission at the 72n ...
'' (1999), ''
St. George Shoots the Dragon ''St. George Slays the Dragon'' ( sr, Свети Георгије убива аждаху, ) is a Serbian war drama film directed by Srđan Dragojević and written by Dušan Kovačević. The movie premiered on March 11, 2009. With a budget of ar ...
'' (2009) and some 10 other movies and co-productions.


Gallery


See also

*
Subotička Peščara Subotička Peščara ( sr-cyr, Суботичка пешчара) or Subotica Sands is an inland dune habitat located in northern Serbia, along the Hungarian border. The area stretches across the far north of the Bačka region, in the municipality ...
* (''Zagajička (Zagajska) Brda'') * Pannonian tourism region in Serbia *
Oleshky Sands Oleshky Sands ( ua, Олешківські піски, Oleshkivsʹki pisky) is a desert in Ukraine. It is situated inland from the Ukrainian coast of the Black Sea and consists of sand dunes or ''kuchuhury'' (locally), which reach a height up t ...


References


External links

* * {{DEFAULTSORT:Deliblatska Pescara Dunes of Serbia Deserts of Europe Geography of Vojvodina Banat Deserts of Serbia Hills of Serbia Geographical regions of Serbia Nature reserves in Serbia