2TE10U locomotive expects cars with salt on a deadlock way of Baskunchak station. To the south of the lake Mount Bolshoye Bogdo rises to 150 meters above sea level, forming the highest elevation in the Caspian Depression. The hill is pushed up about 1 mm per year by a salt dome. Sinkholes, and Karst caves of up to 1.5 km length lead through the hill. It also is the only area in Europe where Triassic lagerstatten surface. To the local Kalmyk people, it is a holy hill.