- California894 objects
- North America894 objects
- Northern California✖Remove constraint Collection place: Northern California894 objects
- The Americas894 objects
- United States894 objects
- Northeastern California878 objects
- Modoc County, California742 objects
- Surprise Valley, Modoc County, California725 objects
- CA-Mod-204, Modoc County, California655 objects
- Lassen County, California67 objects
- Northern Sierras, Northern California57 objects
- CA-Las-194, Surprise Valley, Lassen County50 objects
- Surprise Valley, Lassen County, California50 objects
- Nevada County, California35 objects
- San Juan Ridge, Nevada County, California35 objects
- CA-Mod-247, Modoc County, California30 objects
- CA-Mod-215, Modoc County, California25 objects
- Placer County, California20 objects
- CA-Nev-15, Nevada County, California19 objects
- CA-Pla-5 or 6, Placer County, California13 objects