- North America24 objects
- The Americas24 objects
- United States✖Remove constraint Collection place: United States24 objects
- California20 objects
- North Central California11 objects
- Northern California11 objects
- San Francisco Bay Area, California9 objects
- Sacramento County, California7 objects
- Contra Costa County, California6 objects
- CA-Sac-107 (Windmiller Mound), Sacramento County, California5 objects
- Churchill County, Nevada4 objects
- Nevada4 objects
- San Joaquin County, California4 objects
- CA-CCo-259, Rodeo, Contra Costa County3 objects
- CA-SJo-68, San Joaquin County, California3 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada3 objects
- Rodeo, Contra Costa County, California3 objects
- Unincorporated western Contra Costa County, California3 objects
- CA-CCo-138, Oakley, Contra Costa County2 objects
- CA-Sac-109 (Drescher Mound), Sacramento County, California2 objects