Here are the names of natural wonders that correspond to each description:

1. **Desert** - A large area of land where there is almost no water, rains, trees, or plants.
2. **River** - A large area of water that flows towards the sea.
3. **Island** - A large area of land that is surrounded by water.
4. **Lake** - A piece of land that is completely surrounded by water (this can also refer to a body of water).
5. **Waterfall** - A place where a stream or river falls down from a high place.
6. **Forest** - A large area of land that is covered with a lot of trees.
7. **Valley** - A low area of land between mountains or hills.
8. **Cave** - A large hole in the side of a hill or under the ground.

Feel free to adjust any terms as needed!