- North America12 objects
- The Americas12 objects
- United States12 objects
- California11 objects
- San Francisco Bay Area, California11 objects
- Contra Costa County, California10 objects
- CA-CCo-138, Oakley, Contra Costa County9 objects
- Oakley, Contra Costa County, California9 objects
- CA-CCo-151, El Sobrante, Contra Costa County1 objects
- CA-Sol-2, Solano County, California1 objects
- Churchill County, Nevada1 objects
- El Sobrante, Contra Costa County, California1 objects
- Lindsey Slough, Solano County, California1 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada1 objects
- Nevada1 objects
- Solano County, California1 objects
- Unincorporated western Contra Costa County, California1 objects