The Bacho Kiro cave is situated 5 km west of the town Dryanovo, Bulgaria, only 300 m away from the Dryanovo Monastery. It is embedded in the exquisit canyons of the Andaka and Dryanovo River. The first tourists entered the cave in 1938, two years before it was actually called the Bacho Kiro cave after the Bulgarian National Revival enlightener Bacho Kiro.
The cave is a four-storey labyrinth of galleries and corridors with a total length of 3,600 metres, 700 metres of which are maintained for tourists' attraction. The earliest human remains found in Bulgaria have been excavated in the Bacho Kiro cave. With an approximate age of 46,000 years, the remains consist of a pair of fragmented human jaws, but it is disputed whether these early humans were in fact Homo sapiens or Neanderthals.