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•    Presidential Sites
•    Colleges 1819-1850
•    Colleges 1851-1900
•    Colleges 1901-1950
•    Colleges 1951-Present
•    Industry 1860
•    Parks Present
•    Parks 1900's
•    Parks 1800's
•    Industry & Agriculture
•    Railroads
•    Underground Railroad
•    Waterways (Rivers/Streams)
•    Waterways (Canals)
•    Waterways (Port)
•    Municipalities 1856
•    Border
•    Neighborhoods