İstanbul

Adalar

Turkey

This is a narrow crack on a wall which is going into the land about 30 meters, some places are very narrow and there are fallen stones from  the top of the crack and many of them ready to fall. At the end because of the fallen stones you have to stop and to come out of the water then to look to the ceiling in a way to get panic and try to go out of there. Also you can see some wild pigeons  when you come at surface in the cave. 

It is a crack on the wall which the half of it is in the sea, you need a boat to go there.

Büyükada - Pigeon Cave is also known as Peristerona.