- North America1,080 objects
- The Americas1,080 objects
- United States✖Remove constraint Collection place: United States1,080 objects
- Nevada696 objects
- Churchill County, Nevada668 objects
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada444 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada182 objects
- California110 objects
- Northwestern United States59 objects
- Southern California52 objects
- Northern Channel Islands, Santa Barbara County, California49 objects
- Santa Barbara County, California49 objects
- Santa Cruz Island, Channel Islands, Southern California48 objects
- CA-SCrI-100, Santa Cruz Island, Channel Islands45 objects
- Southwestern United States41 objects
- Four Corners Region, Southwestern United States32 objects
- Central California27 objects
- South Central California26 objects
- NV-Ch-24 (Ocala Cave), Churchill County, Nevada23 objects
- Northern California23 objects