High Quality Content by WIKIPEDIA articles! Concentrations of megaliths, dolmens and stone labyrinths have been found (but little studied) throughout the Caucasus Mountains, including the Abkhazia. Most of them are represented by rectangular structures made of stone slabs or cut in rocks with holes in their facade. These dolmens cover the Western Caucasus on both sides of the mountain ridge, in an area of approximately 12.000 square kilometres of Russia and Abkhazia.