Estarkhi is one of the beautiful villages of North Khorasan which located in the Gelyan Rural district. It has 28 km distance far from South of Shirvan. This village is formed on the edge of the mountaineer valley with beautiful nature. In the foothills of the Estarkhi valley, there is a stream river that fed from several springs and after routing, it forms a cascade of about 20 meters high, with a beautiful view. The people of the area call this cascade «Sharshar». This area has a cool and pleasant Atmosphere in the summer and attracts a lot of tourists.