Kuma-Manych Depression

The Kuma-Manych Depression (Russian: Кумо-Манычская впадина, Kumo-manychskaya Vpadina), also called Manych, or Manyč, is a geologic depression in western Russia that divides the Russian Plain (north) from the North Caucasus foreland (south).

It is regarded by some experts as the natural boundary between Europe and Asia.