- North America✖Remove constraint Collection place: North America1,445 objects
- The Americas1,445 objects
- United States1,436 objects
- Nevada696 objects
- California684 objects
- Northern California500 objects
- Northeastern California410 objects
- Pershing County, Nevada277 objects
- Modoc County, California244 objects
- Humboldt County, Nevada238 objects
- Surprise Valley, Modoc County, California232 objects
- Northern Sierras, Northern California166 objects
- San Francisco Bay Area, California135 objects
- Calaveras County, California131 objects
- CA-Mod-197, Modoc County, California124 objects
- Churchill County, Nevada117 objects
- CA-Cal-142, Calaveras County, California106 objects
- NV-Hu-300, Humboldt County, Nevada93 objects
- North Central California88 objects
- NV-Pe-71, Pershing County, Nevada64 objects