- North America✖Remove constraint Collection place: North America1,460 objects
- The Americas1,460 objects
- United States1,460 objects
- Nevada1,080 objects
- Pershing County, Nevada710 objects
- Humboldt Lake Bed, Pershing County, Nevada699 objects
- Churchill County, Nevada322 objects
- Humboldt Lake region, Churchill County, Nevada295 objects
- NV-Ch-13, Churchill County, Nevada282 objects
- California160 objects
- Northeastern United States132 objects
- West Virginia132 objects
- Wood County, West Virginia132 objects
- Central California103 objects
- South Central California103 objects
- CA-Fre-115, Fresno County, California101 objects
- Fresno County, California101 objects
- Nye County, Nevada37 objects
- Southeastern United States34 objects
- Southern Great Lakes states, United States32 objects