A mountain with a large, circular hole at the top through with lava inside it.
volcano
Massive and really elevated portion of the Earth's crust.
mountain
A large area of flat land with few trees.
plain
An area of land that is higher than the surrounding land, but not as high as mountains.
hills
A piece of land surrounded by water.
island
Where a river splits and spreads out into branches before going to the sea.
delta
A piece of land projecting out into a body of water, almost surrounded by water.
peninsula
A sudden drop of water along the river course.
waterfall
Low area of land between hills or mountains.
valley
Large hole in the side of a hill, cliff, or mountain, or underground.
cave
An area, often covered with sand or rocks, where there is very little rain and not many plants.
desert
It's similar to a bay, but larger.
gulf
Large mass of ice that moves slowly.
glacier
Large valley with very steep sides and usually a river flowing along the bottom.
canyon
A very steep, vertical face of rock, earth, or ice.
cliff
Wide valley, open area between hills and sometimes with rivers.
dale
