Rocky wasteland that has been carved by erosion into intricate and fantastic shapes.
A small area of sea or lake partly enclosed by dry land.
The sandy or rocky land at the edge of an ocean, sea or lake.
An isolated rocky hill or mountain with a small flat top.
Area where shallow water of oceans or seas meet the land and waves work to form beaches, cliffs, and coastal dunes.
The central opening associated with the main vent of a volcano.
A small stream, often a shallow tributary to a river.
Dry and desolate land that receives little or no rainfall. Most are covered with rocks and stones. Only one fifth of all desert surfaces are covered with sand.
Continental divide is the long mountain ridgelines that determine the directions a continent's rivers will flow.
A great mass of ice slowly sliding down a mountain slope or through a valley; very slowly moving rivers of ice.
A deep, narrow passage with steep, rocky sides, as between mountains.
A region thickly covered with trees and abundant underbrush.
A large inland body of water.
A cave or tunnel formed inside a lava flow. The tube is created when the outer crust of the lava stream cools and solidifies, but the molten interior continues to flow.
A bend in the winding, looping course of many lowland rivers.
A mesa is similar to a butte except it has a large flat top.
A rugged, upthrust mass of rock that looms high above the surrounding land.
A long connected chain of mountains and hills.
The entire body of salt water that covers nearly three-quarters of the earth's surface. The Pacific Ocean is the largest ocean.
A large natural stream of water that flows into an ocean or lake, usually receiving water from smaller streams that flow into it.
A long, broad ocean inlet that is roughly parallel to the coast.
A stream that flows over the edge of a cliff. A large, dramatic waterfall that plunges down from a high, overhanging precipice is a cataract. A small, splashing waterfall that tumbles down a mountain side in a series of steps is a cascade. Salt Creek Falls is an example of a cataract.