| Location: It lies on the left slope of Kurudere flowing between the Kücükbursa Hill and the Kocacal Hill (983 m); 2 km northwest of the Calkara Village; about 30 km northwest of Eskisehir. It has an entrance overviewing the Sakarya River. It is accessible from the Eskisehir-Inhisar (Bilecik) road; which is an asphalted road passing through the Calkara Village. It is reached after a one-hour walk from the village. |
| Geography and Environment: It is a spring type of fossil cave which developed horizontally. It was formed over two intersecting fault lines in the northwest-southeast and north-south directions within the Upper Permian Triassic aged Derbent limestones. The width reaches to 18 m at some parts while the roof height reaches up to 5 m. The floor of the main gallery is covered with soil; debris and big collapsed blocks. At the intersection point of the faults; the cave shapes into a rounded hall. In this alcove-shaped galleries; which comprise the deepest part of the cave (-35 m); there are stalactites; stalagmites; columns and wall dripstones. Decorations are rare in other sections. |
| Destruction Details: |
