Open to the public

"The Huey" (Hamilton County, Tennessee)
146th Field Artillery Regiment Memorial (Walla Walla County, Washington)
Memorial to the 146th Field Artillery Washington National Guard dedicated in 2002
1501 Broadway (New York County, New York)
16th Street Viaduct (Milwaukee County, Wisconsin)
One of four ways to cross the Menomonee River valley
191 Peachtree Tower (Fulton County, Georgia)
Skscraper in Atlanta, GA
1918 Standard Oil Filling Station (Ogle County, Illinois)
1927 Lake Lure Inn and Spa (Rutherford County, North Carolina)
Historic Hotel in Lake Lure, NC
1939 St. Bernard Parish Courthouse (St. Bernard Parish, Louisiana)
27 Twin Drive-In (Pulaski County, Kentucky)
32nd Division Memorial (Racine County, Wisconsin)
Monument to the 32nd Division and the Red Arrow Highway
32nd Division Memorial Highway (Vilas County, Wisconsin)
32nd Division Memorial Highway (Kenosha County, Wisconsin)
Historical Marker in honor of the 32nd Division, "Les Terribles"
5 Points Theater (Richland County, South Carolina)
500 Jefferson Building (Harris County, Texas)
600 Building (Nueces County, Texas)
755th Aircraft Control and Warning Squadron (Walworth County, Wisconsin)
Location of a former Cold War radar station, now an industrial park
9-11 Memorial (Chatham County, North Carolina)
Actual Steel Beam from a World Trade Center Building
A Home for Rangers (Mariposa County, California)
Display about the Rangers' Club
A. Cavalli & Company (San Francisco County, California)
A. Quinn Jones House (Alachua County, Florida)
A.P. Woodson and Leigh Yawkey Woodson House (Marathon County, Wisconsin)
Prairie School of Design mansion built in 1914, now serving the Marathon County Historical Society
Aaron Haines Family Cemetery (Greene County, New York)
Abandoned Route 66 - Towanda Parkway (McLean County, Illinois)
Abraham Lincoln Monument (Albany County, Wyoming)
Statue of Abraham Lincoln in honor of the Lincoln Highway, precursor to I-80
Abraham Lincoln Statue (Multnomah County, Oregon)
Bronze statue of Lincoln by George F. Waters installed in 1928
Abraham Pierson Statue (New Haven County, Connecticut)
Bronze statue of Abraham Pierson by Launt Thompson cast in 1874; in New Haven
Academic Hall (Cape Girardeau County, Missouri)
Administrative building for Southeast Missouri State University
Acoma (Cibola County, New Mexico)
Acree Mitchell Grocery Store (Stephens County, Georgia)
Adams Camp Ranger Station (Idaho County, Idaho)
Historic ranger station now used as rental cabin.
Adams Corners Schoolhouse (Putnam County, New York)
One-room schoolhouse museum, temporarily closed in Putnam Valley.
Adams County Courthouse (Adams County, Washington)
Late Art Deco 3 story brick courthouse built in 1940
Adams Schoolhouse (Fairfield County, Connecticut)
One-room school maintained by the Historical Society of Easton, CT
Adel Public Square Historic District (Dallas County, Iowa)
Brick paved streets and delightful old architecture surrounding the courthouse
Adler House (Baker County, Oregon)
Italianate Victorian house built 1889
Admiral Theatre (Kitsap County, Washington)
Admiralty Head Lighthouse (Island County, Washington)
Mission Revival style lighthouse built in 1903
Adolph Gold House (Gillespie County, Texas)
Adolphus Busch Grave (St. Louis, Missouri)
Aero Diner (Windham County, Connecticut)
Fully restored 1950's era diner.
African Cemetery at Higgs Beach (Monroe County, Florida)
Aggie Memorial Stadium (Dona Ana County, New Mexico)
Aiken County Judicial Center (Aiken County, South Carolina)
County Courthouse in Aiken, SC
Airlie House (Fauquier County, Virginia)
Airplane Service Station (Knox County, Tennessee)
Aladdin Theater (Multnomah County, Oregon)
Mission revival movie theater opened 1927
Alameda Theatre (Alameda County, California)
Alamodome (Bexar County, Texas)
Alaska Airlines Field at Husky Stadium (King County, Washington)
Albany Cinema (Alameda County, California)
Albany County Supreme Court (Albany County, New York)
Albertsons Stadium (Ada County, Idaho)
Albion Carnegie Library (Boone County, Nebraska)
Albion Carousel (Erie County, Pennsylvania)
America's third oldest wooden carousel
Albuquerque Police Substation (Bernalillo County, New Mexico)
Alderson Bridge (Greenbrier County, West Virginia)
Aldrich Public Library (Washington County, Vermont)
Alexander County Courthouse (Alexander County, North Carolina)
County Courthouse in Taylorsville, NC
Alexandria Union Station (Alexandria, Virginia)
Alger Theatre (Lake County, Oregon)
Art Deco 500 seat movie theater opened 1940
Alhambra Theatre (Christian County, Kentucky)
Allegheny Commons (Allegheny County, Pennsylvania)
Aloha Stadium (Honolulu County, Hawaii)
Alpenhof Lodge (Teton County, Wyoming)
Alta Vista Cemetery (Hall County, Georgia)
Altenberg (Perry County, Missouri)
Alto City Hall (Habersham County, Georgia)
Alumni Stadium (Unspecified county, Massachusetts)
Alvarado House (San Diego County, California)
Adobe house built prior to 1830
Amelia County Courthouse (Amelia County, Virginia)
American Legion Memorial Building (Bracken County, Kentucky)
American Legion Memorial To 1943 USAAF Crash (Newberry County, South Carolina)
Memorial to those lost in a USAAF B-25 collision
American Thread Company (Windham County, Connecticut)
A preserved mill complex that manufactured cotton thread.
Amherst County Courthouse (Amherst County, Virginia)
Amon G. Carter Stadium (Tarrant County, Texas)
Amon Park Entrance Arch (Benton County, Washington)
Sandstone arch marking the entrance to Howard Amon Park erected in 2010
Amtrak Station (San Diego County, California)
Modernist railway station built in 1994
Anaconda Copper Mining Company Locomotive #122 (Silver Bow County, Montana)
Davenport 0-4-0 T Locomotive built in 1916
Anamosa/Wapsipinicon State Park Bridge (Jones County, Iowa)
Single span, pin-connected Pratt through truss spanning the Wapsipinicon River
Anderson Country Club (Anderson County, South Carolina)
Historic antebellum plantation home, now utilized as a golf course
Anderson County Courthouse (Anderson County, South Carolina)
New county courthouse in Anderson, SC
Anderson County Courthouse (Anderson County, Tennessee)
County Courthouse in Clinton, TN
Anderson County Courthouse (Anderson County, Kentucky)
Anderson Falls (Bartholomew County, Indiana)
Anderson Sports and Entertainment Center (Anderson County, South Carolina)
Civic & Sports Complex in Anderson, SC
Andersonville Boy (Hartford County, Connecticut)
Bronze and granite Civil War Monument dedicated in 1907 in Hartford.
Andersonville National Historic Site (Sumter County, Georgia)
Confederate prison camp and POW museum
Andy Gump (Walworth County, Wisconsin)
A statue of a prominent, albeit fictional, resident of Lake Geneva
Angel Oak Park (Charleston County, South Carolina)
Angels Theater (Calaveras County, California)
Angola Commercial Historic District (Steuben County, Indiana)
Courthouse Square, Downtown Angola
Ankeny Square Colonnade (Multnomah County, Oregon)
Cast Iron colonnade at Ankeny Square
Anshe Chesed Cemetery (Warren County, Mississippi)
Anson County Courthouse (Anson County, North Carolina)
Antlers Hotel (Baker County, Oregon)
Modern 4 story brick hotel building completed 1910
Antoinette (Sheboygan County, Wisconsin)
Antone Guard Station (Beaverhead County, Montana)
Apogee Stadium (Denton County, Texas)
Arbor Grove- Whitlow Cemetery (Lawrence County, Arkansas)
Arcata Theater (Humboldt County, California)
Arch Street Bridge over the Passaic River (Passaic County, New Jersey)
Arizona Stadium (Pima County, Arizona)
Armstrong Cork Company (Lancaster County, Pennsylvania)
Arnold Trail to Quebec (Kennebec County, Maine)
Arrowhead Monument (McDowell County, North Carolina)
Monument commemorating peace between the indigenous tribes and early American pioneers of Western North Carolina
Arrowsic Town Hall (Sagadahoc County, Maine)
Art Association of Harrisburg (Dauphin County, Pennsylvania)
Arthur Ravenel Jr. Bridge (Charleston County, South Carolina)
Arthur's Paradise Diner (Middlesex County, Massachusetts)
Classic diner, home of the "delicious" Boott Mill Sandwich in Lowell
Arvonia School (Osage County, Kansas)
Arvonia School (Coffey County, Kansas)
Asbury Cemetery (Hamilton County, Ohio)
Ashe County Courthouse (Ashe County, North Carolina)
New County Courthouse in Jefferson, NC
Ashley Church (Charleston County, South Carolina)
Historic African-American church in Edisto Island, SC
Ashley River Road (Charleston County, South Carolina)
Asian Art Museum of San Francisco (San Francisco County, California)
Beaux-Arts library built 1917, renovated as art museum 2003
Asotin County Courthouse (Asotin County, Washington)
Three building brick courthouse complex built in 1905/1907/1936
Astoria City Hall (New) (Clatsop County, Oregon)
American Renaissance style bank building built in 1923
Astoria Labor Temple (Clatsop County, Oregon)
Art Deco influenced 4 story office building completed in 1925
Astronomers Monument (Los Angeles County, California)
Concrete monument completed in 1934
AT & SF & MKT Depot (Washington County, Oklahoma)
Athens City Hall (Clarke County, Georgia)
Atlantic Greyhound Bus Terminal (Chatham County, Georgia)
Atlas ICBM "Waterbird" training missile (Jackson County, Oklahoma)
ATSF Motive Power Building (Shawnee County, Kansas)
Attalla Downtown Historic District (Etowah County, Alabama)
Audi Theatre (Towner County, North Dakota)
Auditorium Hotel (Harris County, Texas)
August and Mary Westphal House (Washington County, Wisconsin)
English Tudor style mansion now operating as a bed and breakfast
Aura Goodwin Raley "Mother of Pendleton" Statue (Umatilla County, Oregon)
Bronze outdoor sculpture of Aura G. Raley by Jerry Werner cast in 2016
Aurora Colony Ox Barn (Marion County, Oregon)
Clapboard barn built in 1863
Aurora Theater (Gwinnett County, Georgia)
Auroraville Fountain (Waushara County, Wisconsin)
Well bored for convenience of travelers and their horses
Ausable Chasm (Clinton County, New York)
Auto 25 Drive-In (Greenwood County, South Carolina)
Dual Screen Drive-In Theater
Autzen Stadium (Lane County, Oregon)
Avalon Theater (Colfax County, Nebraska)
Avalon Theater (Multnomah County, Oregon)
Movie theater opened 1912
Avenue of the 444 Flags (Mercer County, Pennsylvania)
Avenue dedicated to the Iranian hostages
Aviation Navigation Arrow (Washington County, Utah)
Lost aviation navigation beacon and remaining concrete directional arrow.
Avon Combination Depot (Hartford County, Connecticut)
Combination depot built by the New York & New Haven RR about 1848-1850
Avon Five Arch Bridge (Livingston County, New York)
5 Arch, Closed-Spandrel, Railroad Bridge
Aztec Grist Mill (Colfax County, New Mexico)
B & B's Diner (Gentry County, Missouri)
B and B Carousel (Kings County, New York)
B Street Pier (Del Norte County, California)
900-foot-long wooden fishing pier built in 1989
B&O - Paint Creek bridge (Clarion County, Pennsylvania)
Former B&O Railroad bridge over Paint Creek
B-47E Stratojet (Jackson County, Oklahoma)
B. Harley Bradley House and Stable (Kankakee County, Illinois)
One of the first FLW Prairie School Design homes
Babcock and Wilcox House (Clark County, Nevada)
Minimal Traditional style two bedroom house built in 1933
Bacone College Historic District (Muskogee County, Oklahoma)
Badwater (Inyo County, California)
Lowest point in North America at 282 feet below sea level
Baker City Carnegie Library (Arts Center) (Baker County, Oregon)
Colonial style 1 story rough stone building built 1909
Baker City City Hall (Baker County, Oregon)
Rennaissance Revival 2 story city hall completed 1903
Baker County Courthouse (Baker County, Oregon)
Richardsonian Romanesque courthouse built 1909
Baker, Judah, Windmill (Barnstable County, Massachusetts)
One of Cape Cod's restored windmills
Bakerville School (Litchfield County, Connecticut)
Used as school building until 1942. Bakerville Library located here since 1951; in New Hartford.
Balboa Park Administration Building (San Diego County, California)
Balboa Park Botanical Building (San Diego County, California)
Wood lathe botanical conservatory built in 1915
Bald Butte Lookout (Lake County, Oregon)
Bald Knob Cross (Union County, Illinois)
Baldwin County Courthouse (Baldwin County, Georgia)
Baldwin Saloon (Wasco County, Oregon)
Brick & cast iron front saloon built in 1877
Ball Mill Resurgence (Perry County, Missouri)
Baltimore Covered Bridge (Windsor County, Vermont)
Covered Lattice Truss Bridge in Gould's Mill (Springfield)
Baltimore National Cemetery (Baltimore, Maryland)
Ban Johnson Gravesite (Owen County, Indiana)
Ban Johnson Gravesite in Riverside Cemetery
Band Saw Monument (Mason County, Washington)
Bandelier CCC Historic District (Sandoval County, New Mexico)
Bank of America Plaza (Fulton County, Georgia)
Tallest building in Atlanta, GA
Bank of Chester County (Chester County, Pennsylvania)
Bank of Dahlonega (Lumpkin County, Georgia)
Bank of Hawai'i, Ltd., (Hawaii County, Hawaii)
Banks County Courthouse (New) (Banks County, Georgia)
Bar Gulch Cabin (Broadwater County, Montana)
Barber Hill Schoolhouse (Hartford County, Connecticut)
Built in 1861. Dismantled at its Griffin Road location and restored in 2017.
Barn Hill-East Village Schoolhouse (Fairfield County, Connecticut)
A one-room schoolhouse restored as a museum by the Monroe Historical Society.
Barnwell County Courthouse (Barnwell County, South Carolina)
County Courthouse in Barnwell, SC
Barren County Courthouse (Barren County, Kentucky)
Barters Island Baptist Church (Lincoln County, Maine)
Barton Cabin (Idaho County, Idaho)
Basilica of the Sacred Heart (St. Joseph County, Indiana)
Extravagantly decorated neo-gothic Catholic church.
Basin Harbor Club (Addison County, Vermont)
Bass Harbor Memorial Library (Hancock County, Maine)
Bastien's Restaurant (Denver County, Colorado)
Bastien's Restaurant features 'Googie-style' architecture
Bath & Hammondsport RR Depot (Steuben County, New York)
Wooden 2-story railroad depot in Hammondsport
Bath County Courthouse (Bath County, Virginia)
Bath County Courthouse (Bath County, Kentucky)
Battell Fountain (Litchfield County, Connecticut)
Batterymarch Building (Suffolk County, Massachusetts)