A small stream flows through the cave, which is considered the second longest cave in the world, and there is a historical castle on the cave. Location of the Cave Çal Cave is 5km away from Düzköy District of Trabzon Province. 1050m from the sea in the southwest. It is located in Yüksekte Çal village town. Shape of the Cave: Çal Cave is an underground water channel. Although the entrance of the cave is wide, the width inside is constantly changing. Ceiling heights vary greatly depending on fracture systems. After the entrance, it divides into two branches at 200 m. The branch branching off to the left is approximately 150 m. It is in length. In the room at the end of this branch, there is a chimney through which the water from the doline flows. The accessible part of the right arm is approximately 400 m. There is a small lake and waterfall at approximately 60 meters of this branch.