- California1,264 objects
- North America1,264 objects
- Northeastern California✖Remove constraint Collection place: Northeastern California1,264 objects
- Northern California1,264 objects
- The Americas1,264 objects
- United States1,264 objects
- Modoc County, California922 objects
- Surprise Valley, Modoc County, California911 objects
- CA-Mod-204, Modoc County, California884 objects
- Northern Sierras, Northern California189 objects
- Lassen County, California112 objects
- CA-Las-194, Surprise Valley, Lassen County102 objects
- Surprise Valley, Lassen County, California102 objects
- Nevada County, California77 objects
- San Juan Ridge, Nevada County, California76 objects
- CA-Nev-15, Nevada County, California66 objects
- Calaveras County, California38 objects
- Amador County, California22 objects
- CA-Ama-3 (Bamert Cave), Amador County, California22 objects
- Siskiyou County, California22 objects