- North America214 objects
- The Americas214 objects
- United States214 objects
- Churchill County, Nevada208 objects
- Nevada208 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada196 objects
- NV-Ch-24 (Ocala Cave), Churchill County, Nevada12 objects
- CA-Sol-236 (Glen Cove), Vallejo, Solano County6 objects
- California6 objects
- Glencove, Solano County, California6 objects
- San Francisco Bay Area, California6 objects
- Solano County, California6 objects
- Vallejo area, Solano County, California6 objects
- Vallejo, Solano County, California6 objects