1. Landforms: In Texas and around the United States
A landform is a natural structure on the Earth’s surface.

2. Galveston Bay, Texas
A bay is a body of water that is partly enclosed by land.

3. Grand Canyon, Arizona
A canyon is a deep narrow valley with steep sides; it often has a stream or river running through it.

4. Palo Duro Canyon, Texas

5. Grand Canyon, Arizona

6. Grand Canyon of Yellowstone, Wyoming

7. Guadalupe Canyon, Mexico

8. Cave with No Name, Texas
A cave is a large hole in the ground or in the side of a hill or mountain; usually formed by weathering and erosion.

9. Cave with No Name, Texas

10. Mississippi River Delta, Louisiana
A delta is a large flat area of land at the mouth of a river. Deltas are formed by the deposition of sediments as a river flows into a gulf, bay, or ocean.

11. Brazos River Delta, Texas

12. South Padre Island, Texas
Dunes, sometimes called sand dunes, are hills of sand deposited by the wind; dunes are most often found on beaches and in deserts.

13. Monahans Sand Hills, Texas

14. Gulf of Mexico
A gulf is a part of the ocean or sea that is partially surrounded by land. A gulf is larger than a bay.

15. Texas Hill Country
A hill is a raised area or mound of land. Hills are not as high as mountains.

16. Galveston Island
An island is land that is completely surrounded by water.

17. Davis Mountains, Texas
A mountain is a very tall, natural place on Earth’s surface.

18. Guadalupe Mountains, Texas
El Capitan in the Guadalupe Mountains is the most photographed mountain in Texas.

19. Mount Hood National Forest, Oregon
A valley is a long, low area of land, often with a river or stream running through it, that is surrounded by higher ground. The sides of a valley are not usually as steep as those of a canyon.

20. Canyon Valley Ranch, Texas

21. Enchanted Rock, Texas