- North America22 objects
- The Americas22 objects
- United States✖Remove constraint Collection place: United States22 objects
- Churchill County, Nevada15 objects
- Nevada15 objects
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada14 objects
- California7 objects
- San Francisco Bay Area, California5 objects
- San Francisco County, California5 objects
- San Francisco Waterfront, San Francisco, San Francisco County5 objects
- San Francisco, San Francisco County, California5 objects
- Site N-2 (North Point Tunnel), San Francisco Waterfront, San Francisco3 objects
- CA-Mnt-18, Carmel, Monterey County2 objects
- Carmel Mission, Monterey County, California2 objects
- Central California2 objects
- Central California coast2 objects
- Monterey County, California2 objects
- Site SE, San Francisco Waterfront, San Francisco2 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada1 objects