There are many state boundaries between Asia and Europe, mainly including these.
1. Ural Mountains
The mountain range is 40-150 kilometers wide. The middle section is low and flat, which is an important passage between Europe and Asia.
2. Ural River
Originating in the south of the Ural Mountains, flowing through the Russian Federation and the Republic of Kazakhstan, it flows into the Caspian Sea in Atyrau, with a total length of 2428 kilometers. It is the fourth largest inland river in the world, and its main tributaries include the Sakmara River.
3. Great Caucasus Mountains
Bordering the Black Sea in the west and the Caspian Sea in the east, it extends from northwest to southeast on the borders of Russia, Georgia and Azerbaijan, with a total length of more than 1100 kilometers, a maximum width of 180 kilometers, and an area of about 145000 square kilometers.
4. Turkish Straits
It connects the Mediterranean Sea and the Black Sea. It is the only strait between the Mediterranean Sea and the Black Sea, so it is also called the Black Sea Strait.
5. Black Sea
It covers an area of about 424000 square kilometers. The Black Sea is connected to the Mediterranean Sea through the Turkish Strait.
6. Caspian Sea
Located at the inland junction of Europe and Asia. The Caspian Sea has an ecosystem similar to the ocean, and the maritime industry is developed.