Collection place
- Calaveras County, California3 objects
- California248 objects
- Campo (CDP), San Diego County, California1 objects
- Canada11 objects
- Caroline Islands4 objects
- Central Africa6 objects
- Central Arizona1 objects
- Central California43 objects
- Central Mexico2 objects
- Central Oregon12 objects
- Central Washington2 objects
- Chiapas, Mexico2 objects
- Chin Hills, Myanmar1 objects
- China7 objects
- Churchill County, Nevada10 objects
- Churntown (historical), Shasta Lake, Shasta County1 objects
- Cloverdale, Sonoma County, California2 objects
- Coachella Valley, Riverside County, California1 objects
- Cochise County, Arizona5 objects
- Colonia Lerdo (ghost town), San Luis Rio Colorado, Sonora2 objects