Bacho Kiro cave

Bacho Kiro cave, a photo by adammlewis on Flickr.

Via Flickr:

Situated 300 metres away from the Dryanovo Monastery is a network of caves in the canyons of the Andaka and Dryanovo River. Named after the 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. This is the view through three of the stories.