Great Basin - Nevada, USA
 

What is a Basin?

 
A natural depression in the surface of the land, often with a lake at the bottom.
 

What is an Example of a Basin

 
Encompassing the entire state of Nevada, and much of Utah, Idaho, and Oregon, the Great Basin is an arid, mountainous area in the western United States, between the Rocky Mountains and the Sierra Nevada Range. It consists of a series of mountain ranges in Nevada including the East Humboldt, Ruby, and White Mountains. The basin itself is a series of watersheds with no outlet to the sea or to a river that flows to the sea. Any precipitation that falls evaporates, seeps into ground, or forms playas, short lived lakes that eventually evaporate.