"Svirchovitsa" Cave
"Svirchovitsa" cave is part of the Karlukovo karst complex and is located near the "Prohodna" cave, near the village of Karlukovo. The entrance to the cave is sloping, going down a steep path, with wooden railings. It is a three storeys, branched cave. Its length is 232 m, and its depth is 39 m.