Gökgöl Cave, with a total length of 3,350 meters, is the tenth longest cave in Turkey and the second longest in Zonguldak. An underground stream, whose flow rate increases in rainy periods, flows in the cave, which has an 875-meter walking path. The interior of Gökgöl Cave is extremely rich in terms of drip stone accumulation. The sections of the cave from the entrance to the great depression hall are called Fossil Entrance, Asthma Hall, Wonders Hall and Miracle Hall. As can be understood from the names of the halls, there are all kinds of formations in the cave. Stalactites, stalagmites, columns formed by the combination of stalactites and stalagmites, as well as flag dripstones and dense pasta stalactites on the stream are worth seeing. Gökgöl Cave has a microclimate feature due to the fact that the temperature and humidity do not change much throughout the year.

Gökgöl Cave, which was opened to tourism in 2001; It has an important tourism potential in terms of industrial and geological heritage elements, with its formation lighting in different concepts, disabled-friendly walking paths, glass bridges, viewing terraces and the newly completed gift shop, visitor center, toilet and parking lot, as well as being located right next to the Ankara-Zonguldak highway. It is a strong tourism value with the advantages of being close to the city center of Zonguldak.