Babini Boski Cavevillage of Mramor in Haskovo, BulgariaIt is 324 m long. In the beginning, the cave corridor is very narrow, but soon expands and one can enjoy the cave halls. There are not plenty of cave formations inside. A small river passes through it as local people say its waters go on the surface at the fountains of the Holy Trinity Monastery.
The cave has not been electrified and urbanized for tourists. If one decides to go inside, a good lighting device and a pair of boots are mandatory.