- California30 objects
- North America30 objects
- Northeastern California✖Remove constraint Collection place: Northeastern California30 objects
- Northern California30 objects
- The Americas30 objects
- United States30 objects
- Lassen County, California16 objects
- CA-Las-7, Karlo area, Lassen County5 objects
- Karlo area, Lassen County, California5 objects
- Siskiyou County, California5 objects
- unknown archaeological site in Northeastern California3 objects
- CA-Sis-262 (Foster site), Bogus Creek, Siskiyou County2 objects
- CA-Sis-7, Lava fields, Siskiyou County2 objects
- Canby's Cross, Lava fields, Siskiyou County2 objects
- Lava fields, Siskiyou County, California2 objects
- Modoc County, California2 objects
- Northern Sierras, Northern California2 objects
- Secret Valley, Lassen County, California2 objects
- Shasta County, California2 objects
- 5 mi. S. of Truckee, on Lake Tahoe road, Placer County1 objects