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Subject (Region)
- Nicaragua Canal (Nicaragua)[remove]24
- Nicaragua15
- Alaska, Department and District of (1867-1912)9
- Arizona Territory (1863-1912)9
- District of Columbia9
- New Mexico Territory (1850-1912)9
- Oklahoma Territory (1890-1907)9
- Hot Springs National Park (Arkansas)8
- United States8
- Yellowstone National Park8
- Yosemite National Park (California)8
- Sequoia National Park (California)7
- Indian Territory (1834-1907)6
- Kings Canyon National Park (California)5
- Utah Territory (1850-1896)5
- Utah3
- California2
- Colorado2
- Costa Rica2
- Florida2