The cave, which starts near Doğanalan Village of Mustafakemalpaşa district, ends 5.5 km after around Nilüfer Ayvaköy. The cave, which has entrances from both directions, is closed to tourism due to its steep entrances, but it is preferred by professional mountaineers and cavers. The Karadonlu stream passing through it has formed more than 60 ponds of various sizes along the cave. The stalactites, stalagmites and travertines decorating the cave at every step are natural wonders.
Transportation: In order to reach the beginning part of the cave, it is necessary to proceed for 2 km from the stabilized road that goes to the northeast from Doğanalan village of Mustafakemalpaşa.