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A broad, shallow, and gently curved bend or recess in a coastline, river, or other geographical feature that forms a very open bay
Bight
a broad, flat, and continuous desert area exceeding 125 square kilometers (48 square miles) covered by at least 20%
Erg
a land formation with a flat area on top and steep walls - usually occurring in dry areas.
Mesa
a dry, semi-arid ecoregion characterized by vast, flat or rolling grassland plains with very few or no trees, except near rivers and lakes.
Steppe
large, flowing body of water that usually empties into a sea or ocean.
river
a body of water that is partly enclosed by land (and is usually smaller than a gulf).
Bay
is a low, watery land formed at the mouth of a river. It is formed from the silt, sand and small rocks that flow downstream in the river and are deposited in the delta. A delta is often (but not always) shaped like a triangle (hence its name, delta, a Greek letter that is shaped like a triangle).
Delta
a shallow body of water that is located alongside a coast.
Lagoon
a large, flat area of land that is higher than the surrounding land.
plateau
a dense, tall forest characterized by continuous tree canopies, high annual rainfall, rich biodiversity, and high humidity.
rainforest
a ring (or partial ring) of coral that forms an island in an ocean or sea. The coral sits atop a submerged volcanic cone.
Basin
a body of water that connects two larger bodies of water (like the English Channel). A channel is also a part of a river or harbor that is deep enough to let ships sail through.
Channel
a narrow strip of land connecting two larger landmasses.
isthmus
flat lands that have only small changes in elevation.
Plain
is an elongated low area of the Earth's surface located between hills or mountains, typically shaped by water or glacial erosion.
A valley
a ring (or partial ring) of coral that forms an island in an ocean or sea. The coral sits atop a submerged volcanic cone.
Atoll
a pointed piece of land that sticks out into a sea, ocean, lake, or river.
Cape
a natural hot spring that occasionally sprays water and steam above the ground.
Gyser
a body of land that is surrounded by water on three sides.
peninsula
a stream or river that flows into a larger river.
T
ributary
a group or chain of islands
clustered together in a sea or ocean.
archipelag
a flat-topped rock or hill formation with steep sides.
Butte
a long, narrow sea inlet that is bordered by steep cliffs.
Fjord
fertile or green area in an arid region or desert where water from natural springs, wells, or underground aquifers reaches the surface, supporting plant and animal life.
Oasis
a narrow body of water that connects two larger bodies of water.
strait