It is located 1 kilometer from Çayırköy, 3 kilometers north of Güdüllü Village on the 10th kilometer of Zonguldak-Çaycuma highway. Sofular and Eğridere waters sink from the Çayırköy cave entrance and drain from Çayırköy by advancing 1004 meters below the ground.

The entrance starts with a steep drop of about 30 meters and reaches the siphon after 500 meters. The siphon can only be passed in periods when water is scarce. From here, there is a deep lake at the end of the cave, which goes horizontally with lakes.