- North America501 objects
- The Americas501 objects
- United States✖Remove constraint Collection place: United States501 objects
- Nevada497 objects
- Churchill County, Nevada482 objects
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada444 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada36 objects
- Pershing County, Nevada15 objects
- NV-Pe-8, Pershing County, Nevada7 objects
- California4 objects
- NV-Pe-12, Pershing County, Nevada4 objects
- Northern California4 objects
- NV-Pe-14, Pershing County, Nevada3 objects
- Amador County, California2 objects
- CA-Ama-3 (Bamert Cave), Amador County, California2 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California2 objects
- CA-Sac-6, Sacramento County, California2 objects
- Grimes Point Caves, Churchill County, Nevada2 objects
- North Central California2 objects
- Northeastern California2 objects