Article -the- with geographical names.

 I went sailing around ____Lake Geneva.

He was born in ____New York City

He lives in ____ United States.

_____ Nile is a long African river.

___ Rocky Mountains are very high.

Her husband comes from____ California.

I love swimming in____ Mediterranean.

 Poland is part of ___European Union.

____ Mount Everest is the Earth's highest mountain.

The oldest and deepest lake in the world is ____Lake Baïkal. 

The lake is completely surrounded by mountains. On the north shore are _____Baïkal Mountains.

_____Pacific Ocean is the largest ocean in the world.