Yes, the River Don connects the Black Sea and the Caspian Sea. It flows into the Sea of Azov, which is linked to the Black Sea, and further extends through the Don River basin. However, there is no direct navigable route between the two seas, as the river system is not continuous due to various geographical features.
The CAUCASUS MOUNTAINS run from the Black Sea to the Caspian Sea.
The Black sea and the Caspian sea.
The River Volga flows into the Caspian Sea.
The river Volga flows out into the Caspian Sea.
Yes, the Volga has many small rivers flowing into it.
The Caspian Sea
Major tributaries are Kama River and Oka River
There is a canal linking the Volga River with Moscow at Ivankovo, north of Moscow.
The Caspian sea does not have connection to the World Ocean, so it is not real sea (like Black sea, that ultimately connected to the Atlantic ocean via the Mediterranen sea). The Caspian Sea is linked by canals to the Black Sea and via the Volga River and canals to the Baltic.
Germany
The longest draining into the Caspian Sea is the Volga River, 3692 Kms
The Volga River flows into the Caspian Sea, which is the world's largest inland body of water.