devetàshka cave is a large karst cave around 7 km east of letnitsa and 15 km northeast of lovech

devetanbsp shka cave large karst km east letnitsa 15 northeast lovech adventure ancient attraction background bulgaria cavern cliff crag dark destination devetaki devetashka ecology ecosystem entrance environment famous formation geology hole indoor inside interior landmark landscape light limestone mountain natural nature old panoramic path prodigy river rock speleology stalactite stalagmite stone tourism travel tunnel underground view wall