a large hole in the side of a hill or cliff or under the ground
cave
a large area of land that is thickly covered with trees
forest
a very high hill, often with rocks near the top
mountain
a large area of water that is surrounded by land
lake
an area of land that is higher than the land around it, but not as high as a mountain
hill
a natural flow of water that continues in a long line across land to the sea
river
an area of sand, next to the sea or a lake
beach
a mountain with a large opening at the top through which gases and lava (= hot liquid rock) are forced out into the air, or have been in the past
volcano
an area of tropical forest where trees and plants grow very thickly
jungle
a large area of land that has very little water and very few plants growing on it.
desert
a piece of land that is completely surrounded by water
island
the mass of salt water that covers most of the earth’s surface
ocean
an area of low land between hills or mountains, often with a river flowing through it
valley
a place where a stream or river falls from a high place
waterfall