The Deaf Stones (Gluhite kamani) is a cult site several kilometers from the village of Malko Gradishte. It represents an isolated 30-meter high rock, and number of smaller ones in which the so-called rock bays are engraved at different height. They are one of the phenomena of the ancient Thracian culture, which have been examined for decades, but still very little is revealed.
About 50 meters from the bays there are megalith tombs, two of which preserved in excellent condition. The firs one represents a chamber, 2 m long and 1.5m wide, which is carved into the limestone. From there a ritual staircase climes with two rays separated by a platform, after which the staircase changes its direction. The staircase reaches a height of 7.59 m and has 33 steps. At the 19th step is the platform. On the top of the megalith a quadrangular room 3x3m is dug into the rock. The excavations have uncovered foundations of a stone wall which surrounded the whole cult site.