Petén is a department of the nation of Guatemala. It is geographically the northernmost department of Guatemala, as well as the largest in size — at 13,843 sq mi (35,854 km2) it accounts for about one third of Guatemala's area. The capital is Flores. The population at the 2002 Census was 366,735; the latest official estimate as of mid-2012 was 662,779.
The Petén department is bordered on the east by Belize and by Mexico on the north and west, with the Mexican state of Chiapas to the west, Tabasco to the northwest and Campeche to the north. To the south it borders the Guatemalan departments of Alta Verapaz and Izabal. Much of the western border with Mexico is formed by the Usumacinta River and its tributary the Salinas River. Portions of the southern border of the department are formed by the rivers Gracias a Dios and Santa Isabel.
The Petén lowlands are formed by a densely forested low-lying limestone plain featuring karstic topography. The area is crossed by low east-west oriented ridges of Cenozoic limestone and is characterised by a variety of forest and soil types; water sources include generally small rivers and low-lying seasonal swamps known as bajos. A chain of fourteen lakes runs across the central drainage basin of the Petén; during the rainy season some of these lakes become interconnected. This drainage area measures approximately 100 kilometres (62 mi) east-west by 30 kilometres (19 mi) north-south. The largest lake is Lake Petén Itza, near the centre of the drainage basin; it measures 32 by 5 kilometres (19.9 by 3.1 mi). A broad savannah extends south of the central lakes; it features a compact red clay soil that is too poor to support heavy cultivation. This resulted in a relatively low level of pre-Columbian occupation. The savannah has an average altitude of 150 metres (490 ft) above mean sea level with karstic ridges reaching an average altitude of 300 metres (980 ft). The savannah is surrounded by hills with unusually steep southern slopes and gentler northern approaches; the hills are covered with dense tropical forest. To the north of the lakes region bajos become more frequent, interspersed with forest. In the far north of the Petén the Mirador Basin forms another interior drainage region. To the south Petén reaches an altitude of approximately 500 metres (1,600 ft) as it rises towards the Guatemalan Highlands and meets Paleozoic metamorphic rocks.
The main bodies of standing water in the department are the lakes Petén Itzá, Peténchel, Quexil, Salpetén and Macanche in the centre of the department; Yaxhá and Sacnab in the east, Petexbatún in the southwest, and Perdida, Larga, La Gloria, San Diego, Mendoza, El Repasto and Lacandón in the west.
The climate of Petén is divided into wet and dry seasons, although these seasons are not clearly defined in the south; the climate varies from tropical in the south to semitropical in the north. Temperature varies between 12 and 40 °C (54 and 104 °F), although it does not usually drop beneath 18 °C (64 °F). Mean temperature varies from 24.3 °C (75.7 °F) in the southeast around Poptún to 26.9 °C (80.4 °F) around Uaxactún in the northeast. Highest temperatures are reached from April to June; January is the coldest month. All Petén experiences a hot dry period in late August. Annual precipitation is high, varying from a mean of 1,198 millimetres (47.2 in) in the northeast to 2,007 millimetres (79.0 in) in central Petén around Flores. The extreme southeast of Petén experiences the largest variations in temperature and rainfall, with precipitation reaching as much as 3,000 millimetres (120 in) in a year.
The Petén department was created by decree of the Guatemalan government on 8 May 1866.
Starting in the 1960s the Guatemalan government offered land in Petén to any citizen willing to settle on it and pay a fee of $25. A road was opened up to Flores, although it was unpaved, and the notorious bus trip to Flores was known to take up to 24 hours to travel the 300 miles (500 km). Small airports were built at Flores and Tikal, bringing tourists to the region. In the early 1970s a road was opened from Tikal to Belize. The first paved road in Petén was built in 1982.
Since the 1990s many new settlers have come to Petén. The area is also experiencing severe deforestation in its southern half. Deforestation has been particularly rapid near Laguna del Tigre National Park in western Petén. To combat deforestation, Guatemalan president Álvaro Colom proposed dramatically expanding ecotourism around Maya archaeological sites, especially El Mirador, and trying to further develop an agricultural system in the southern portion of the Maya Biosphere Reserve that would prevent further northward migration. He called his plan "Cuatro Balam".
Petén consists of the following twelve municipalities, listed below with their populations in 2002 and 2012:
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The Petén department includes a large number of archaeological sites belonging to the ancient Maya civilization, many of which have only received minimal attention by archaeologists.
Other archaeological sites include: Altar de Sacrificios, La Amelia, Arroyo de Piedra, Bejucal, Cancuén, El Caribe, El Chal, Cival, La Corona, Dos Pilas, Holmul, Holtun, Itzan, Ixkun, Ixlu, Ixtonton, Ixtutz, La Joyanca, Kinal, Machaquila, El Mirador, Motul de San José, La Muerta, Muralla de León, Naachtun, Nakbe, Naranjo, El Peru, Piedras Negras, Polol, El Porvenir, Punta de Chimino, Río Azul, Sacul, San Bartolo, La Sufricaya, Tamarindito, Tayasal, El Tintal, Tres Islas, Ucanal, Xultun, Zacpeten, Zapote Bobal and El Zotz.
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