Karst landscapes are very specific in terms of its natural characteristics: geology, relief, water circulation, vegetation and soils. The specificity is due to the presence in the landscape of “lower underground floor” in form of a network of canals, cavities and caves, closely associated with the terrestrial part of the landscape. The article analyzes the karst landscape as a binary geosystem, consisting of two subsystems: surface and underground. Interactions between two subsystems (exchange of material and energy) are the essence of functioning of karst landscape and are ʺresponsibleʺ for formation of its dynamic-evolutionary peculiarities and physiognomy