A low area of land between hills or mountains.

A large natural stream of water flowing in a channel to the sea or a lake.

A deep gorge, typically one with a river flowing through it.

A cascade of water falling from a height, formed when a river or stream flows over a steep incline.

A vast body of salt water that covers almost three fourths of the earth's surface. (five of them)

A place that gets little to no rain, is usually flat and has no vegetation.

A large open area of land covered with grass.

A large area covered with trees and undergrowth.

A large body of water surrounded by land.

A steep rock face, especially at the edge of the sea.

A large natural elevation of the earth's surface rising abruptly from the surrounding level.

A small, narrow river.