Structures by Type
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Airports and Airlines (2)
Airfields, Airports, Airlines, and anything related to flying
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Amusement Parks (4)
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Automobile, Carriage, and Wagon Companies (36)
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Bank Buildings (33)
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Barns (60)
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Historic Breweries (48)
Breweries, Distilleries, and anything related to the manufacture of alcoholic beverages
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Historic Bridges (109)
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Historic Cemeteries (66)
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Historic Church Buildings (136)
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Historic City Halls (10)
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Historic Commercial Buildings (144)
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Historic Communications Facilities (13)
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Historic Community Buildings (24)
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Historic Courthouse Buildings (12)
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Covered Bridges (347)
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Historic Customs Houses (1)
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Historic Department Stores (64)
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Fire Stations (1)
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Fire Watchtowers - Lookout Towers (8)
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Historic Grain Elevators (10)
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Historic Hospitals and Medical Facilities (34)
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Historic Hotels (172)
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Historic Houses (725)
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Mansions of the Gilded Age (9)
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Historic Hydroelectric Power Plants (26)
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Historic Industrial Buildings (270)
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Historic Library Buildings (14)
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Historic Lighthouses (202)
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Historic Mansions and Estates (207)
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Historic Meeting House and Fraternal Lodge Buildings (14)
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Historic Military Facilities (5)
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Historic Mills (59)
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Historic Mines (4)
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Historic Apartment buildings (20)
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Historic Museums and Galleries (11)
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Historic Office Buildings (41)
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Historic Farms and Plantations (246)
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Historic Police Stations (1)
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Historic Post Office Buildings (10)
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Historic Power Plant Buildings (32)
Facilities related to the generation of electricity
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Historic Prisons and Jails (8)
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Historic Recreation Facilities (8)
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Historic Restaurants and Food Stands (6)
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Historic Retail Buildings and Department Stores (112)
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Historic Roadside Attractions (24)
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Round Barns (55)
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Historic Route 66 (8)
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Historic School Buildings (387)
Education Buildings including public and private K-12 buildings as well as College, University, and Vocational Education Buildings and Sites
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Historic Gas and Service Stations (19)
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Historic Special and Unique Structures (7)
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Historic Stadiums and Arenas (9)
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Historic Steel Mills and Related Facilities (4)
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Historic Textile Mills (31)
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Historic Theaters (75)
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Historic Railroad - Train Stations (370)
Train Depots, Rail Yards and repair faclities, Railroad Bridges and Tunnels, and everything else related to Trains
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Historic Warehouse Buildings (11)