- California52 objects
- North America52 objects
- North Central California52 objects
- Northern California52 objects
- The Americas52 objects
- United States52 objects
- CA-Yol-53, Yolo County, California36 objects
- Elk Slough, Yolo County, California36 objects
- Yolo County, California36 objects
- CA-Sac-16 (Bennet Mound), Sacramento County, California8 objects
- CA-Sut-11 (Verona Mound), Sutter County, California8 objects
- Sacramento County, California8 objects
- Sutter County, California8 objects