The Volkonsky dolmen is the only full-size monolithic dolmen in the world that has been preserved. This means that the chamber is completely carved into the sandstone rock through a small entrance hole.
The Volkonsky dolmen is located at the bottom of a river valley in the village of Volkonka, in Russia's Greater Sochi region. It is a popular tourist attraction and is protected by the state.
Carved into a shapeless rock mass by sampling the softer inner component of the monolith. The facade is designed in the form of a tiled dolmen portal. The inlet is practically intact. The inner chamber has a domed (semicircular) shape about 1.5 meters high with a flat floor. The walls of the room have not been sanded, the room may not be finished. The floor has a depression at the entrance, which may have been beaten by treasure hunters. The dolmen plug is absent. At the back, the dolmen has one semicircular opening and is therefore also a ritual cup stone.