The baltic sea's area is 145,560 square miles.
The Caspian Sea
Lake Superior is actually smaller than the Caspian Sea. The Caspian Sea is larger in both volume and surface.
the north sea is about 222,000 square miles
the North Sea is about 222,000 square miles
surface area 310 square miles
The Dead Sea has an area of 230 square miles
surface area 310 square miles
The Mediterranean sea's area is 2,500,000 square kilometers.
It covers an area of 482,000 square miles or 1,249,000 square kilometers.
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.
Death Valley National Park is 5,216 square miles.