Collection place
- Macuxtepetla, Hidalgo, Mexico3 objects
- Mad River near Korbel and Blue Lake, Humboldt County, California15 objects
- Mad River slough, Humboldt County, California93 objects
- Mad River, Humboldt County, California142 objects
- Madaba, Jordan (ancient place)1 objects
- Madagascar15 objects
- Madain Salih, Saudi Arabia5 objects
- Madang Province, Momase Region, Papua New Guinea85 objects
- Maddox Stronghold, Chaco Canyon, San Juan County1 objects
- Madeline Plains near Dodge Reservoir, Lassen County, California1 objects
- Madeline Plains, Lassen County, California537 objects
- Madera County, California1,322 objects
- Madera Municipality, Chihuahua, Mexico115 objects
- Madhav Bagh (Hindu temple), Mumbai, Maharashtra State1 objects
- Madhubani, Bihar, India10 objects
- Madhya Pradesh, India1,587 objects
- Madison County, Illinois14 objects
- Madre de Dios Region, Southern Peru27 objects
- Madrid, Spain3 objects
- Mae Hong Son Province, Thailand23 objects