- North America86 objects
- The Americas86 objects
- United States86 objects
- California79 objects
- CA-Col-1 (Miller Mound), Colusa County, California66 objects
- Colusa County, California66 objects
- North Central California66 objects
- Northern California66 objects
- CA-CCo-141, Palm Tract, Contra Costa County13 objects
- Contra Costa County, California13 objects
- Palm Tract, Contra Costa County, California13 objects
- San Francisco Bay Area, California13 objects
- Unincorporated eastern Contra Costa County, California13 objects
- Churchill County, Nevada7 objects
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada7 objects
- Nevada7 objects