The Ayvaini Cave
The cave is located inside the borders of the Ayva village of Bursa.
Properties: Except the entrance section, the cave is horizontally developed. There are two entrances to the cave. Entering the cave from one point (Doğanalanı) and leaving the cave from another is possible. Just at the entrance of the cave, there is a vertical downward descend of 17 meters which are shallow enough to pass.