Collection place
- Marina District, San Francisco, San Francisco County6 objects
- Mexico8 objects
- Middle East3 objects
- Milwaukee County, Wisconsin1 objects
- Milwaukee, Milwaukee County, Wisconsin1 objects
- Mono County, California4 objects
- Mono Lake, Mono County, California4 objects
- Monroe County, New York2 objects
- Montana2 objects
- Mount Carmel, Israel3 objects
- Mount Shasta, Siskiyou County, California2 objects