the historical bridge from the time of the frigas, located in the blackhole of the butane province. The bridge was built on Banaz tea about 2500 years ago. The two pillars of the bridge sit on the halfway of the mountain rocks. the length is 24 meters, the depth is 17 meters, the width is 1.75 meters. the faces of the stones are handled with pens and the large stones of the arches are tightly interlocked with each other. the belt is in the form of a pulley.
the bridge was constructed with the overlaying technique on the fixed rock consisting of two main bodies called elephant feet. there is no trace of what purpose it was made for. but after one of the key stones played, it was repaired with concrete in recent years and lost its originality.
There is a blackhole power plant next to the bridge. water discharged from the plant is poured from a height of 17 meters beside the bridge with a concrete channel.
The clandras bridge is an important promenade for the surrounding area.
