The cave was officially opened for tourism in 1996 following geological surveys.
It is part of a larger karst topography system that contributes to the local groundwater hydrology of the Ayancık region.
The cave is formed in Upper Cretaceous-aged limestone, a common geological feature in Northern Turkey.
Despite its length, only the first section is regularly illuminated and maintained for public pedestrian access.
İnaltı Mağarası is a karst cave system located in the Ayancık district of Sinop, Turkey, formed by the dissolution of limestone over geological time. The cave features a total length of approximately 658 meters, with a walkable path extending deep into the mountain. Visitors traverse through various chambers showcasing stalactites, stalagmites, and flowstone formations created by dripping mineral-rich water. The cave is situated at an elevation of approximately 1,070 meters above sea level. It is characterized by high humidity levels and a constant cool temperature throughout the year. The entrance is accessed via a series of concrete steps leading from the parking area. The surrounding environment is heavily forested, typical of the humid Black Sea climate region.
The wide entrance portal providing a contrast between the dark cave interior and the green forest outside.
Wear shoes with high traction as the interior walkways can become slippery due to constant dripping water.
Bring a light jacket as the cave maintains a significantly cooler temperature than the outside air regardless of the season.
Check local weather reports before ascending to the cave, as the mountain roads can be challenging during heavy rain.
Do not attempt to stray from the designated path or venture into non-illuminated secondary tunnels.
May be subject to seasonal closures during heavy winter snowfalls due to difficult road access.
Do not touch the stalactites or stalagmites as oils from human skin can disrupt their mineral growth and appearance.
