Marina Dupka is a cave system in the Fore-Balkan, in Tryavna municipality, about 20 minutes on foot from the village of Genchovtsi, in the "Propastite" ("the Chasms") area — named for its many sinkholes. The entrance is at 615 m. The mapped passages are 3,128 m long, with a 45 m difference in height.
The cave was carved in limestone by sinking water. People once entered by the lower entrance — a sinkhole that gathers water from about 4 km around; today it is silted up and passable only for the first 17 m. Entry is now through a shaft about 40 m away, in beech forest. A narrow, difficult section leads to a drop of about 35 m, where the main cave begins.
Two underground rivers flow through it, both ending in sumps. One is thought to emerge in the Zmeyovi Dupki cave, the other at the karst spring near Bozhentsi. The passages are tall but narrow. The largest hall, towards the old entrance, is about 30 m wide and 24 m high. Formations are plentiful, including stalagmites up to 4 m tall and rimstone pools of crystal-clear water.
Two stories explain the name. In one, a girl called Mara warned the outlaw Paro and his band of approaching posses by dropping pebbles into the shaft. In the other, it is "Parova Dupka", the steam hole, because steam rises from the opening in winter.
Marina Dupka is not for visitors. Going in needs climbing gear, a rope, a ladder and caving experience. The tight section before the drop is hard even for experienced cavers. After rain the rivers rise and some passages fill to the ceiling, so entering in wet weather is dangerous.
Genchovtsi is near Tryavna. The cave is about a 20-minute walk from the village.
Gabrovo region
0.9 km away
Gabrovo region
2.7 km away
Gabrovo region
3.1 km away
Marina Dupka Cave is located in Gabrovo, Bulgaria.
Marina Dupka Cave is most easily reached by car. Use the coordinates above to navigate, or open the location in OpenStreetMap or your preferred maps app for turn-by-turn directions. Public transport options vary by region — for remote destinations a rental car gives the most flexibility.
Caves can be visited year-round — the temperature inside stays roughly 10–12°C regardless of season. Spring and autumn are quieter than peak summer. Bring a warm layer and sturdy footwear; some caves close in winter when access roads become impassable.
Access to caves varies. Show caves typically run guided tours during posted opening hours; wild caves require proper equipment and experience. Inside, the temperature stays cool year-round (~10–12°C) — bring a warm layer, sturdy non-slip footwear, and a torch even on guided tours.
