The Kuma–Manych depression (Russian: Кумо–Манычская впадина, romanized: Kumo–Manychskaya vpadina) is a geological depression in southwestern Russia that separates the Russian Plain to the north from Ciscaucasia to the south.

[2] Kuma–Manych depression is sometimes regarded as a definition for the natural boundary between Asia and Europe.

[1][3] The Rostov Nature Reserve is located within the depression.

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