This narrow and high valley is one of the most important and strategic points of the region, located in the western side of the Dareh Shahr – Pol-e-Dokhtar Road. This gorge, which is also called the Bahram Hunting Field, contains several historical monuments in its entrance and on the hard rocks like the ruins of a Sassanide castle which is built of stone and gypsum with stone stairs and four connected water reservoirs which are worth seeing
There are also two pools in this castle which collect the rain water. The brick walls of these pools have been delicately covered with a mixture of sand and limestone. This structure is related to the pre-Islamic times, but has been repaired in the early Islamic era. During the Saljuqi period, this castle was a reputed one.