- North America49 objects
- The Americas49 objects
- United States49 objects
- California41 objects
- Modoc County, California41 objects
- Northeastern California41 objects
- Northern California41 objects
- Surprise Valley, Modoc County, California41 objects
- CA-Mod-247, Modoc County, California30 objects
- NV-Wa-183, Washoe County, Nevada8 objects
- Nevada8 objects
- Washoe County, Nevada8 objects
- CA-Mod-204, Modoc County, California4 objects
- CA-Mod-215, Modoc County, California4 objects
- CA-Mod-203, Modoc County, California2 objects
- CA-Mod-212, Modoc County, California1 objects