- California34 objects
- North America34 objects
- The Americas34 objects
- United States34 objects
- Lake County, California30 objects
- North Central California30 objects
- Northern California30 objects
- CA-Lak-82, Lake County, California17 objects
- CA-Lak-36 (Borax Lake site), Lake County, California13 objects
- CA-Nap-16, Napa Valley, Napa County4 objects
- Lower Napa Valley, Napa County, California4 objects
- Napa County, California4 objects
- Napa Valley, Napa County, California4 objects
- San Francisco Bay Area, California4 objects