The Trigrad Gorge (, ) is a canyon of vertical

marble Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or Dolomite (mineral), dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is ty ...

rocks in the

Rhodope Mountains The Rhodopes (; , ; , ''Rodopi''; ) are a mountain range in Southeastern Europe, and the largest by area in Bulgaria, with over 83% of its area in the southern part of the country and the remainder in Greece. Golyam Perelik is its highest peak ...

. It is in

Smolyan Province Smolyan Province (, ''Oblast Smolyan''; former name Smolyan okrug) is a province in Southern-central Bulgaria, located in the Rhodope Mountains, neighbouring Greece to the south. It is named after its administrative and industrial centre — the ...

, one of the southernmost provinces of

Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...

. The gorge encloses the course of the Trigradska River, which plunges into the Devil's Throat Cave and further emerges as a large

karst Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and Dolomite (rock), dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. Ther ...

spring. It later flows into the River Buynovska. The gorge's west wall reaches in height, while the east one extends up to . Initially, the two walls are about 300 m apart, but the gorge narrows to about in the northern section. The gorge is from the village of Trigrad at

above sea level Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level ...

and has a total length of , of which the gorge proper comprises .

Honour

Trigrad Gap on

Livingston Island Livingston Island (Russian name ''Smolensk'', ) is an Antarctic island in the Southern Ocean, part of the South Shetland Islands, South Shetlands Archipelago, a group of List of Antarctic and subantarctic islands, Antarctic islands north of the ...

in the

South Shetland Islands The South Shetland Islands are a group of List of Antarctic and subantarctic islands, Antarctic islands located in the Drake Passage with a total area of . They lie about north of the Antarctic Peninsula, and between southwest of the n ...

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean (also known as the Antarctic Ocean), it contains the geographic South Pole. ...

, is named after Trigrad settlement and gorge. Canyons and gorges of Bulgaria Landforms of Smolyan Province Rhodope Mountains Tourist attractions in Smolyan Province {{Smolyan-geo-stub