A large area covered with trees
Water dropping from a higher to a lower point
A natural flow of fresh water across the land
An area covered with sand or rocks with very little rain
A mountain with a large hole on top through which lava, gases, steam, and dust are or have been forced out
A tropical forest where plants grow very closely
A large area of water surrounded by land
A hole on the side of a mountain
A raised part of the earth's surface
a piece of land surrounded by water
waterfall
forest
island
volcano
river
lake
desert
mountain
cave
jungle