Nature

3. A dry, sandy region with little or no rainfall, often characterized by extreme temperatures.
6. A large area covered with trees, plants, and wildlife.
8. A large natural flowing watercourse that usually empties into a sea, lake, or another river.
11. A cascade of water falling from a height, often found in rivers or mountains.
12. The time in the evening when the sun disappears below the horizon.
14. Animals and plants living in their natural habitats, not domesticated.
15. The sandy or pebbly area of land along the edge of a body of water, such as an ocean or lake.
16. A large natural elevation of the earth's surface with steep sides and a pointed or rounded summit.

1. A large body of water surrounded by land, typically freshwater.
2. A flying insect with colorful wings and a slender body.
4. A large hole or underground chamber, typically formed by natural processes, such as erosion.
5. A large area covered with trees, plants, and wildlife.
7. The time in the morning when the sun appears above the horizon.
9. A piece of land used for growing flowers, plants, or vegetables.
10. A field with grass and wildflowers, often used for grazing animals.
13. A colorful arc in the sky caused by the reflection, refraction, and dispersion of light in water droplets.