The Ural Mountains are a mountain range located in Russia, stretching from the Arctic Ocean to the Ural River and Kazakhstan. They form part of the traditional boundary between Europe and Asia, and are the natural border between the two continents. The Caspian Sea Range is a mountain range located in the southern part of the Ural Mountains, extending from the Caspian Sea to the Ural River. It is an important geographical feature, as it forms part of the natural boundary between Europe and Asia.