- North America29 objects
- The Americas✖Remove constraint Collection place: The Americas29 objects
- United States29 objects
- California22 objects
- CA-SMa-151 (Phleger Mound), Princeton, San Mateo County19 objects
- Half Moon Bay, San Mateo County, California19 objects
- Princeton, San Mateo County, California19 objects
- San Francisco Bay Area, California19 objects
- San Mateo County, California19 objects
- Churchill County, Nevada6 objects
- NV-Ch-54 (Burnt Cave), Churchill County, Nevada6 objects
- Nevada6 objects
- Northeastern California3 objects
- Northern California3 objects
- CA-Las-201, Surprise Valley, Lassen County2 objects
- Lassen County, California2 objects
- Surprise Valley, Lassen County, California2 objects
- Arizona1 objects
- CA-Mod-229, Modoc County, California1 objects
- Modoc County, California1 objects