Location: Zonguldak
It is situated on the road at Uzulmez district at the 4th km. of Zonguldak way of Zonguldak – Ankara highway. Water coming out of the cave drains into the Uzulmez Creek.

Properties: It is entered out of a huge fossil inlet through the rock blocks. The siphon is reached after 250 meters by walking. Although the siphon has a length of 10 meters, it can be passed especially in summer. After this point, the cave continues as two branches in the direction of water entrance along with the extremely beautiful formations. The cave continuing for 1200 meters and ends with a sediment filling. (The port after this point is not known, yet.) While the creeks and inner lakes are passed easily by walking, sudden flood occurs during big rains. Because of this danger, it is suitable to enter the cave in summer and autumn seasons.