Upper New York Bay
The Mediterranean Sea flows into the Nile.
It is more usual to compare rivers to other rivers, or seas to other seas, but if I am to compare the Hudson River to the Black Sea, the Black Sea does have a larger surface area.
The Caspian Sea
The Jordan river flows into the Dead sea, but the Dead is actually a lake and has no outlet to a sea such as the Mediterranean.
The Dniester River flows into the Black Sea
The river Volga flows out into the Caspian Sea.
The Jordan River flows into the Dead Sea.
It is the Mackensie River.
A river usually flows eventually into the sea.
The river water flows into the sea.
The Dnieper River flows through to Red Sea
River Nile flows into the Mediterranean sea!