Nature

2. A low area of land between hills or mountains, often with a river running through it.
5. A natural underground chamber or series of chambers formed by erosion or other geological processes.
7. A large mass of ice that moves slowly over land, shaping the landscape.
8. A natural watercourse flowing towards an ocean, sea, lake, or another river.
11. A high and elevated landform with a peak or summit.
12. A large area covered with trees and plants, home to various wildlife.
14. A sandy or pebbly shore along the edge of a body of water, such as an ocean or lake.
15. A large open area covered with grass and other low vegetation, often used for grazing animals.

1. A large body of freshwater surrounded by land.
3. A cascade of water falling from a height, often over rocks or cliffs.
4. A landmass surrounded by water, smaller than a continent.
6. A vast expanse of saltwater that covers much of the Earth's surface.
9. A mountain or hill with a vent through which lava, ash, and gases erupt.
10. A dry and arid region with little vegetation and often characterized by sand dunes.
13. A land area saturated with water, supporting unique plant and animal life.