Principally it's the Volga, there are many others.
This is just one of the most important ones :)
The Ural River, the Kura River and the Volga River flow into the Caspian Sea.
Among many others, the Volga.
Volga River
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Rivers flow into the Caspian Sea, they do not flow out of. An example is the Volga River.
Volga and Ural goes into the Casipan sea Lena, Ob, Yeinsey rivers flow into the Arctic ocean
Volga and Ural goes into the Casipan sea Lena, Ob, Yeinsey rivers flow into the Arctic ocean
Yes, the Volga has many small rivers flowing into it.
Major tributaries are Kama River and Oka River
Caspian sea and Black sea.
Caspian Sea
In Caspian Sea
The Caspian is a sea, apart from a couple of rivers, it is completely land locked.
Caspian is the odd one out. Caspian is a sea, the others are rivers.
There are many rivers that flow into inland bodies of water that are not connected to the generality of the oceans and seas. One that comes to mind is the Jordan. Curiously, most of those large inland bodies of water are called seas! E.g. the Aral Sea, the Caspian Sea, the Dead Sea.
Yes the Volga river is one of Russia's most famous rivers. Stalingrad (What is now known as Volgograd) is where one of the most famous WWII battles happened. It is also the longest river in Europe and it does flow south and empty into the Caspian sea.