Subject (Region)
- Australia42
- Russell Senate Office Building40
- Yellowstone National Park40
- China39
- Finland35
- Hot Springs National Park (Arkansas)35
- New York, New York35
- Mexico34
- India33
- Massachusetts30
- Belgium28
- Connecticut28
- Illinois28
- Alaska, Department and District of (1867-1912)27
- New Mexico Territory (1850-1912)27
- Yosemite National Park (California)27
- Chicago26
- Indian Territory (1834-1907)26
- Sequoia National Park (California)25
- Washington (D.C.)25