Koterli Cave

Koterli Cave (also known as Koterkali) is located on the southern side of the Darabkuh ridge, near the village of Bord in Chahardangeh District, Sari County, Mazandaran Province. The main entrance of the cave is about 5.5 meters wide, and there is also a secondary entrance roughly 80 centimeters in diameter.

After entering through the main entrance, you reach a vertical shaft about 25 meters deep. Passing through this shaft requires a descent with proper equipment. Beyond it, the passage splits into two branches, both of which continue downward on a slope. The interior of the cave is small and technical, and it is not suitable for ordinary tourist visits; it requires caving experience and equipment.

To reach Koterli Cave, you first need to travel to the village of Bord in Poshtkuh of Sari, which is about 100 kilometers from the center of Sari County. From the village, a hiking trail or light climbing route continues toward Darabkuh and the cave entrance. The best time to visit the cave is during the mild seasons of spring and summer, when the weather in Poshtkuh is more favorable and safety and access conditions are better. The routes to the village and the natural surroundings of the cave are suitable for those who simply want to enjoy nature; however, entering the cave itself is recommended only with a professional team and caving equipment.