high arches of a huge stone cave with round holes at the top, a tourist road with a fence inside the cave.

adventure amazing arches attr attraction attractiondevetashka background balkans beautiful bulgaria bulgarias cave cavern cliff dark destination devetaki devetashka eco ecology ecosystem entrance environment europe famous fence formation geology green high hiking holes huge inside interior karst landmark landscape large lovech mountain natural nature old outdoor panorama park road rock round scenic sky speleology stone summer top tourism tourist travel tunnel view wall