- California30 objects
- North America30 objects
- Northern California30 objects
- The Americas30 objects
- United States30 objects
- CA-Sie-20, Sierra County, California21 objects
- Northeastern California21 objects
- Northern Sierras, Northern California21 objects
- Sierra County, California21 objects
- CA-Yol-13 (Mustang Mound), Yolo County, California7 objects
- North Central California7 objects
- Yolo County, California7 objects
- Big Lagoon, Humboldt County, California2 objects
- CA-Hum-126 (Keken), Humboldt County, California2 objects
- Humboldt County coast, Humboldt County, California2 objects
- Humboldt County, California2 objects
- Humboldt lagoons, Humboldt County, California2 objects
- Northwestern California2 objects