- North America33 objects
- The Americas33 objects
- United States17 objects
- Great Plains, North America16 objects
- McAlester, Pittsburg, Oklahoma14 objects
- Oklahoma14 objects
- Pittsburg, Oklahoma14 objects
- Southern central United States14 objects
- Nebraska2 objects
- Northern Plains, Great Plains, North America2 objects
- Northern central United States2 objects
- Southern Plains, Great Plains, North America2 objects
- Grand County, Utah1 objects
- Moab, Grand County, Utah1 objects
- Southern Utah1 objects
- Southwestern United States1 objects
- Utah1 objects