They are bodies of water, all seas.
Adriatic, Mediterranean , Baltic, Agean, Sea of Japan, the Red Sea , Arabian Sea, Caspian and Black Sea.
The Baltic Sea, the North Sea, The Atlantic Ocean and the Mediterranean.Also the Adriatic, Ionian and Aegean.Not sure whether the Black Sea or the Caspian Sea count.
The baltic and the adriatic
Russia.
The world's largest lake is the Caspian Sea at 371,000 sq km which is completely enclosed by Russia, Iran, Kazakhstan, Turkmenistan and Azerbaijan. The Caspian Sea is completely land locked and is 28 metres below sea level. The Romans thought it was a sea rather than a lake due to its huge size and the fact that the water was slightly salty to taste.
Caspian Sea & brackish inland sea
The Baltic sea is connected to the Caspian Sea by the Volga-Baltic Waterway.
The largest European peninsulas include the Iberian Peninsula, the Balkan Peninsula, the Scandinavian Peninsula, and the Apennine Peninsula. The largest European seas include the Mediterranean Sea, the Black Sea, the North Sea, the Baltic Sea, and the Caspian Sea (an inland sea).
The Volga River travels 2193 to dump into the Caspian Sea. However, it is made up of miles of other rivers and the Volga-Baltic Waterway connects the Volga to the Baltic Sea.
The Volga
Denmark
Stockholm and Copenhagen