Canyon

a deep valley with steep sides carved by a river over many years

Plain

a broad area of land that is gently rolling or almost flat.

Geyser

a spring that spouts a fountain or jet of hot water and steam into the air at regular intervals.

Prairie

a large area of level or rolling land with grass but few or no trees.

Fjord
a narrow part of the ocean between cliffs or steep hills or mountians

Coastal Plain
a area of flat, low-laying land adjacent to a seacoast and separated from the interior by other features

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