Minimum requirement = personally being in a district or looking at a structure from the outside. There are some for which I know I was probably there, but I didn't include them if I don't remember looking at the structure. I have photographs of many of them and have spent hours in dozens of them.--Appraiser (talk) 03:02, 22 May 2008 (UTC)
- Saturn V Dynamic Test Stand
- Redstone Test Stand
- Neutral Buoyancy Space Simulator
- Propulsion and Structural Test Facility
- California State Capitol
- Hotel del Coronado
- Gaslamp Quarter, San Diego, California (district)
- Alcatraz Island
- Coit Tower
- The Fairmont San Francisco
- Golden Gate Park
- Jackson Square, San Francisco (district)
- Park View Hotel
- San Francisco cable car system (NHL)
- San Francisco–Oakland Bay Bridge
- Santa Cruz Looff Carousel and Roller Coaster
- United States Air Force Academy
- Connecticut State Capitol
- Connecticut Hall (NHL)
- Lewes Historic District (district)
- Indian River Life Saving Service Station
- Fenwick Island Light
- Cadillac Hotel (Florida)
- Miami Beach Architectural District (district)
- Ocean Spray Hotel
- Warm Mineral Springs (spring)
- Castillo de San Marcos (National Monument)
- Bridge of Lions
- St. Augustine Light
- Bok Tower Gardens
- Cape Canaveral Air Force Station (NHL)
- Crawlerway
- Kennedy Space Center Launch Complex 39
- Launch Control Center
- Vehicle Assembly Building
- Venetian Causeway
- Edison and Ford Winter Estates
- Boise Capitol Area District (district)
- Julien Dubuque Bridge
- Lincoln Boyhood Home
- Abraham Lincoln Birthplace National Historic Site (NHS)
- French Market
- Gallier Hall
- Jackson Square, New Orleans
- New Orleans Jazz National Historical Park
- Frostburg Historic District (district)
- Colonial Annapolis Historic District (district)
- Maryland State House (NHL)
- Paca House and Garden
- United States Naval Academy
- Elkridge Site
- Baltimore City Hall
- B&O Railroad Museum (NHL)
- Belvedere Hotel
- Bolton Hill, Baltimore
- Lightship Chesapeake
- Canton Historic District (district)
- Carroll Mansion
- Carrollton Viaduct (NHL)
- Druid Hill Park Historic District (district)
- Edgar Allan Poe House and Museum (NHL)
- Emerson Bromo-Seltzer Tower
- Federal Hill South Historic District (district)
- Federal Hill Historic District (district)
- Fells Point Historic District (district)
- Fifth Regiment Armory
- Flag House & Star-Spangled Banner Museum (NHL)
- Fort McHenry (National Monument)
- Homeland, Baltimore
- Guilford, Baltimore
- Homewood Museum (NHL)
- Baltimore Belt Line
- Johns Hopkins Hospital
- Londontown Manufacturing Company, Inc.
- Lord Baltimore Hotel
- Lovely Lane Methodist Church
- Lyric Opera House
- Montgomery Ward Warehouse and Retail Store
- Mount Clare Station
- Mount Royal Station
- Mount Vernon, Baltimore (NHL) (district)
- Mount Washington, Baltimore (district)
- Old East Baltimore Historic District (district)
- One Charles Center
- Highlandtown, Baltimore
- Peale Museum (NHL)
- Pennsylvania Station (Baltimore)
- Phoenix Shot Tower (NHL)
- Reservoir Hill, Baltimore (district)
- Roland Park, Baltimore (district)
- Senator Theatre
- USS Constellation (1854) (NHL)
- USCGC Taney (WHEC-37) (NHL)
- USS Torsk (SS-423) (NHL)
- Hollins Market (district)
- Upper Fells Point Historic District (district)
- Central Catonsville and Summit Park Historic District (district)
- Hilton (Catonsville, Maryland)
- Mount de Sales Academy (Catonsville, Maryland)
- Old Catonsville Historic District (district)
- Old Catonsville High School
- Patterson Viaduct Ruins
- Winters Lane Historic District (district)
- Dundalk Historic District (district)
- Glyndon Historic District (district)
- Worthington Valley Historic District (district)
- Granite Historic District (district)
- The Cloisters (Lutherville, Maryland)
- My Lady's Manor
- Ellicott's Mills Historic District (district)
- Oella Historic District (district)
- Montrose Mansion and Chapel
- Reisterstown Historic District (district)
- Thomas Viaduct (NHL)
- Goucher College
- The Sheppard and Enoch Pratt Hospital (NHL)
- Lorraine Park Cemetery Gate Lodge
- Sykesville Historic District (district)
- Western Maryland College Historic District (district)
- Westminster Historic District (district)
- Catoctin Furnace Historic District (district)
- Monocacy National Battlefield (NHL)
- Ellicott City Historic District (district)
- National Naval Medical Center
- Baltimore-Washington Parkway
- St. Marys City Historic District (district)
- Washington Monument State Park
- Antietam National Battlefield
- Sturbridge Common Historic District (district)
- Newburyport Historic District (district)
- Old Town Hall Historic District (district)
- Peabody Essex Museum (NHL)
- House of the Seven Gables (NHL) (district)
- Plymouth Rock
- Beacon Hill, Boston, Massachusetts (NHL) (district)
- Boston Common (NHL) (district)
- Boston National Historical Park (Historical Park)
- Bunker Hill Monument (NHL)
- Faneuil Hall (NHL)
- Filene's Department Store
- Massachusetts State House (NHL)
- Old North Church (NHL)
- Paul Revere House (NHL)
- USS Constitution (NHL)
- Revere Beach Reservation
- The Henry Ford (NHL) (district)
- Wayne State University
- Edsel and Eleanor Ford House
- Plummer Building (NHL)
- Daniel F. Akin House
- Church of Saint Mary's (New Trier, Minnesota)
- Church of the Advent (Farmington, Minnesota)
- Dakota County Courthouse
- East Second Street Commercial Historic District (Hastings, Minnesota) (district)
- Ignatius Eckert House
- Exchange Bank Building
- First Presbyterian Church (Hastings, Minnesota)
- Fort Snelling, Minnesota (NHL)
- Mendota Bridge
- Reuben Freeman House
- Hastings Foundry-Star Iron Works
- Hastings Methodist Episcopal Church
- Holz Family Farmstead
- Rudolph Latto House
- William G. LeDuc House
- MacDonald-Todd House
- Mendota, Minnesota (district)
- Emil J. Oberhoffer House
- Ramsey Mill and Old Mill Park
- St. Stefan's Romanian Orthodox Church
- Serbian Home
- Henry H. Sibley House
- Stockyards Exchange
- VanDyke-Libby House
- George W. Wentworth House
- West Second Street Residential Historic District (district)
- Advance Thresher/Emerson-Newton Implement Company
- Basilica of Saint Mary
- Fredrika Bremer Intermediate School
- Cahill School
- Franklin Avenue Bridge
- 10th Avenue Bridge
- Minneapolis Grain Exchange
- Midtown Greenway
- Chicago, Milwaukee, St. Paul and Pacific Depot Freight House and Train Shed
- Minnesota Streetcar Museum
- Farmers and Mechanics Savings Bank (1891)
- First Congregational Church (Minneapolis, Minnesota)
- Woodbury Fisk House
- Foshay Tower
- Healy Block Residential Historic District (district)
- Orpheum Theatre (Minneapolis)
- Intercity Bridge
- Lumber Exchange Building
- Hennepin Center for the Arts
- Minneapolis Armory
- Grain Belt (beer)
- Minneapolis City Hall
- North Loop, Minneapolis (district)
- Minnehaha Grange Hall
- Minnehaha Falls (district)
- Frieda and Henry J. Neils House
- Peavey-Haglin Experimental Concrete Grain Elevator (NHL)
- Pillsbury "A" Mill (NHL)
- Prospect Park, Minneapolis
- Midtown Exchange
- Shubert, Sam S., Theatre
- Saint Anthony Falls (district)
- Sumner Community Library
- Thirty-sixth Street Branch Library
- American Swedish Institute
- Southeast Steam Plant
- University of Minnesota Old Campus Historic District (district)
- Washburn "A" Mill (NHL)
- Washburn Park Water Tower
- Westminster Presbyterian Church, Minneapolis, Minnesota
- White Castle Building No. 8
- Theodore Wirth House-Administration Building
- Aerial Lift Bridge
- Gooseberry Falls State Park
- Saint Croix State Park (NHL)
- Charles A. Lindbergh State Park (NHL)
- Whitewater State Park (district)
- Arlington Hills Library
- John M. Armstrong House
- Assumption School (Minnesota)
- Dr. Ward Beebe House
- Blair Flats
- Bridges No. L-5853 and 92247
- Joseph Brings House
- Eastcliff (mansion)
- Benjamin Brunson House
- Casiville Bullard House
- Burbank-Livingston-Griggs House
- Pierce and Walter Butler House
- C.S.P.S. Hall
- Central Presbyterian Church (St. Paul, Minnesota)
- Church of St. Agnes (Saint Paul, Minnesota)
- Church of St. Bernard (Saint Paul, Minnesota)
- Church of St. Casimir (Saint Paul, Minnesota)
- Church of the Assumption (Saint Paul, Minnesota)
- Colorado Street Bridge (Saint Paul, Minnesota)
- Commerce Building
- Como Park, Zoo, and Conservatory
- William and Catherine Davern Farm House
- Derham Hall and Our Lady of Victory Chapel, College of Saint Catherine
- Finch, Vanslyck, and McConville Dry Goods Company Building
- First Baptist Church of Saint Paul
- Fitzpatrick Building
- Germania Bank Building
- Heman Gibbs Farmstead
- Giesen-Hauser House
- S. Edward Hall House
- Hamm Building
- Harriet Island Pavilion
- Edward and Elizabeth Heimbach House and Carriage House
- Highland Park Tower
- James J. Hill House (NHL)
- Jacob Hinkel House
- Historic Hill District (district)
- Holman Field Administration Building
- Minnesota Governor's Residence
- Irvine Park Historic District (district)
- Krank Manufacturing Company
- Lauer Flats
- Olaf Lee House
- Lowertown Historic District (district)
- David Luckert House
- Manhattan Building (Saint Paul, Minnesota)
- Andrew R. McGill House
- Mendota Road Bridge
- Merchants National Bank
- Mickey's Diner
- Minnesota Boat Club Boathouse on Raspberry Island
- Minnesota Historical Society Building
- Minnesota State Capitol
- Adolf Muench House
- Bandana Square (district)
- Norway Lutheran Church
- Landmark Center (St. Paul)
- Macalester College
- Payne Avenue State Bank
- Pioneer and Endicott Buildings
- Ramsey County Poor Farm Barn
- Alexander Ramsey House
- Rau/Strong House
- Riverside Hangar
- Riverview Branch Library
- Robert Street Bridge
- Rochat-Louise-Sauerwein Block
- Otto W. Rohland Building
- Saint Agatha's Conservatory of Music and Arts
- St. Anthony Park Branch Library
- Saint Joseph's Academy (Saint Paul, Minnesota)
- Saint Matthew's School
- Cathedral of Saint Paul in Saint Paul
- Saint Paul City Hall and Ramsey County Courthouse
- Saint Paul Municipal Grain Terminal
- James J. Hill Reference Library
- Saint Paul Seminary School of Divinity
- Saint Paul Union Depot
- Saint Paul Women's City Club
- Salvation Army Women's Home and Hospital
- Charles W. Schneider House
- Schornstein Grocery and Saloon
- Seventh Street Improvement Arches
- Fitzgerald Theater
- Triune Masonic Temple
- Luther Seminary
- Hamline University
- Vienna and Earl Apartment Buildings
- Anthony Waldman House
- Walsh Building
- Martin Weber House
- West Summit Avenue Historic District (district)
- Woodland Park District (district)
- Anthony Yoerg, Sr. House
- St. Louis Union Station (NHL)
- Jefferson National Expansion Memorial (NHL)
- Raymond Boston and Maine Railroad Depot
- Cape May Historic District (NHL) (district)
- Cape May Lighthouse
- Asbury Park Convention Hall
- Sandy Hook Light (NHL)
- Villa Philmonte (district)
- Montauk Point Light
- Statue of Liberty (National Monument)
- Empire State Building (NHL)
- Cape Hatteras Light (NHL)
- Caffeys Inlet Lifesaving Station
- Wright Brothers National Memorial (National Memorial)
- Bodie Island Light
- Mercersburg Academy
- Gettysburg Battlefield
- Hopewell Furnace National Historic Site (National Historic Site)
- Mercer Museum (NHL) (CP)
- Pennsylvania State Capitol (NHL)
- Railroad Museum of Pennsylvania
- Valley Forge National Historical Park (National Historic Park)
- Washington's Headquarters (Valley Forge) (NHL)
- Franklin Institute
- Independence National Historical Park (National Historic Park)
- Beale Street
- Graceland (NHL)
- Tulip Grove
- The Hermitage (Tennessee) (NHL)
- Union Station (Nashville)
- Parthenon (Nashville)
- Peabody College (NHL)
- Ryman Auditorium (NHL)
- Tennessee State Capitol (NHL)
- Tennessee State Library and Archives
- Vanderbilt University
- Alamo Mission in San Antonio (NHL)
- MLyndon B. Johnson Space Center (NHL)
- Houston City Hall
- USS Texas (BB-35) (NHL)
- Netherlands Carillon
- Alexandria Historic District (district) (NHL)
- George Washington Memorial Parkway
- Appomattox Court House (National Historic Park)
- Arlington House, The Robert E. Lee Memorial (National Memorial)
- The Pentagon (NHL)
- Assateague Light
- Monticello (NHL)
- Carter's Grove (NHL)
- Mount Vernon (NHL)
- Historic Jamestowne (National Historic Site)
- Colonial National Historical Park (National Historic Park)
- Cape Henry Light (NHL)
- George Washington Birthplace National Monument (National Monument)
- Stratford Hall Plantation (NHL)
- Bruton Parish Church (NHL)
- James Semple House (NHL)
- Peyton Randolph House (NHL)
- Colonial Williamsburg (district) (NHL)
- Williamsburg Inn
- Wythe House (NHL)
- Tacoma Narrows Bridge
- Washington State Capitol (district)
- Mount Rainier National Park (NHL)
- Paradise Inn (Washington) (NHL)
- Puget Sound Naval Shipyard and Intermediate Maintenance Facility (NHL)
- Allstadt House and Ordinary
- Harpers Ferry Historic District (district)
- Harpers Ferry National Historical Park (National Historic Park)
- Downtown Martinsburg Historic District (district)
- Cass Scenic Railroad
- Northern Wisconsin Co-op Tobacco Pool Warehouse
- Daniels Town Hall
- Sandrock Cliffs
- Burnett County Abstract Company
- Edward N. and Mary T. Stebbins House
- ZCBJ Hall
- Rice Lake Mounds (47 BN-90)
- Cumberland Public Library
- Cushing Land Agency Building
- First Baptist Church (Osceola, Wisconsin)
- Geiger Building-Old Polk County Courthouse
- Alvah A. Heald House
- Minneapolis, St. Paul and Sault Saint Marie Railway Depot
- Osceola Commercial Historic District (district)
- Polk County Courthouse (Wisconsin)
- Thomas Henry Thompson House
- Arlington Memorial Bridge
- Blair House (NHL)
- Capitol Hill, Washington, D.C. (district)
- Chesapeake and Ohio Canal National Historical Park (National Historic Park)
- Dupont Circle (district)
- Old Executive Office Building (NHL)
- Ford's Theatre (National Historic Site)
- Francis Scott Key Bridge (Washington)
- George Washington Memorial Parkway
- Georgetown, Washington, D.C. (NHL) (district)
- Korean War Veterans Memorial (National Memorial)
- President's Park (NHL)
- Library of Congress (NHL)
- Lincoln Memorial (National Memorial)
- National Archives and Records Administration
- Washington National Cathedral
- National Mall
- Pennsylvania Avenue National Historic Site (National Historic Site)
- Smithsonian National Zoological Park
- Rock Creek Park
- Rock Creek and Potomac Parkway
- Franklin Delano Roosevelt Memorial (National Memorial)
- Smithsonian Institution Building (NHL)
- Jefferson Memorial (National Memorial)
- Treasury Building (Washington, D.C.) (NHL)
- United States Capitol (NHL)
- United States National Arboretum
- United States Supreme Court building (NHL)
- Union Station (Washington, D.C.)
- Vietnam Veterans Memorial (National Memorial)
- Washington Monument (National Memorial)
- Watergate complex
- Willard InterContinental Washington
- Christiansted National Historic Site (National Historic Site)
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