Built 1840

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A. G. Grant Homestead (Franklin County, Ohio)
Adams-Gray House (Coshocton County, Ohio)
Adlai E. Stevenson I, House (Woodford County, Illinois)
Admiral's House (New York County, New York)
Alabama State Penitentiary (Elmore County, Alabama)
The first state prison established in Alabama.
Albon Chase House (Clarke County, Georgia)
Alexander Young Cabin (Washington County, Iowa)
Alice Lord Goodine House (Caledonia County, Vermont)
Alsop, Richard IV, House (Middlesex County, Connecticut)
Amis-Bragg House (Northampton County, North Carolina)
Amite County Courthouse (Amite County, Mississippi)
Ancram Schoolhouse (Columbia County, New York)
Schoolhouse now a private home in Ancram.
Ansel Clark House (Lorain County, Ohio)
Appleby's Methodist Church (Dorchester County, South Carolina)
Archibald Taylor Plantation House (Granville County, North Carolina)
Arnheim (Radford, Virginia)
Asa E. Young House (Barren County, Kentucky)
Ashland (Bertie County, North Carolina)
Ashleigh (Fauquier County, Virginia)
Aspen Hall (Mercer County, Kentucky)
Baldwin-Reynolds House (Crawford County, Pennsylvania)
Barr House (Fairfield County, Ohio)
Barton Hall (Colbert County, Alabama)
Bass--Morrell House (Giles County, Tennessee)
Bass-Perry House (Russell County, Alabama)
Bechelbronn (Lunenburg County, Virginia)
Ben Fuller House (Du Page County, Illinois)
Historic farm home on the Fullersburg Woods Forest Preserve in Hinsdale, IL
Benjamin Franklin Smyth House (Winston County, Mississippi)
Benjamin Wadsworth House (Lorain County, Ohio)
Bethany Historic District (Brooke County, West Virginia)
Bethlehem Methodist Church and Cemetery (Montgomery County, Tennessee)
Bloomfield Academy (Somerset County, Maine)
Boligee Hill (Greene County, Alabama)
A historic plantation house near Boligee, Alabama.
Bomberger's Distillery (Lebanon County, Pennsylvania)
Booth--Dunham Estate (Kalamazoo County, Michigan)
Bracken Baptist Church (Mason County, Kentucky)
Brand-Barrow House (Fayette County, Kentucky)
Brattleboro Downtown Historic District (Windham County, Vermont)
Brewers Hill Historic District (Milwaukee County, Wisconsin)
A neighborhood of mixed styles, created before the days of zoning and building codes
Brooks, Luther, House (Middlesex County, Massachusetts)
Bruntwood (Nelson County, Kentucky)
Bruynswick School No. 8 (Ulster County, New York)
Buena Vista (Roanoke, Virginia)
Campbell House (Christian County, Kentucky)
Canal Fulton Historic District (Stark County, Ohio)
Capt. Alva Bradley House (Erie County, Ohio)
Carpenter Street School (Gloucester County, New Jersey)
Carrollton Historic District (Orleans Parish, Louisiana)
Carter's Quarters (Murray County, Georgia)
Cedar Grove (Warren County, Mississippi)
Cedar Grove Plantation (Marengo County, Alabama)
A Greek Revival plantation house located near Faunsdale, Alabama.
Cedar Point (Surry County, North Carolina)
Chalk Bluff (Clay County, Arkansas)
Chancellor House (Shelby County, Alabama)
Charles B. Aycock Birthplace (Wayne County, North Carolina)
Charles Pierce House (Greene County, New York)
Charlton Wallace House (Hamilton County, Ohio)
Chellowe (Buckingham County, Virginia)
Chickamauga Historic District (Walker County, Georgia)
Christian A. Bergt Farm (Perry County, Missouri)
Christian Meeting House (Boone County, Kentucky)
Claymont Court (Jefferson County, West Virginia)
Cobb School (Caledonia County, Vermont)
Colebrook Manor (Chester County, Pennsylvania)
Collins Avenue Historic District (Cobb County, Georgia)
Concord Village Historic District (Knox County, Tennessee)
Conkey-Stevens House (Hampshire County, Massachusetts)
Court Street Historic District (Clinton County, New York)
Court Street Historic District (Broome County, New York)
Courthouse and Lawyers' Row (East Feliciana Parish, Louisiana)
Cranbury Historic District (Middlesex County, New Jersey)
Crawford House (Boyle County, Kentucky)
Culpeper (Nelson County, Kentucky)
Daisy Flour Mill, Inc. (Monroe County, New York)
Former mill now a popular celebration venue
Dauphine Hotel (Osage County, Missouri)
Desserette (Bladen County, North Carolina)
Deutschtown Historic District (Allegheny County, Pennsylvania)
Dole House (Niagara County, New York)
Dorvin House (St. Charles Parish, Louisiana)
Downtown Commercial District (Warren County, Kentucky)
Dr. Robert B. McNutt House (Mercer County, West Virginia)
Draper, John W., House (Westchester County, New York)
DuBois, Peter C., House (Dutchess County, New York)
Dutch Reformed Church of Gansevoort (Saratoga County, New York)
East Andover Village Center Historic District (Merrimack County, New Hampshire)
East End Historic District (Galveston County, Texas)
East Side Historic District (Saratoga County, New York)
Ebenezer Gould House (Shiawassee County, Michigan)
Edgemont (Harrison County, Texas)
Egmont Key (Hillsborough County, Florida)
Emerson, Ezekiel, Farm (Windsor County, Vermont)
Erastus Dean Farmstead (Rock County, Wisconsin)
Antebellum farm of a prominent Wisconsin legislator and farmer.
Estes Farm (Albemarle County, Virginia)
Evergreen--Callaway--Deyerle House (Franklin County, Virginia)
Exton Hotel (Chester County, Pennsylvania)
Father DeSmet's Prairie Mass Site (Sublette County, Wyoming)
Faunsdale Plantation (Marengo County, Alabama)
A historic plantation near Faunsdale, Alabama.
Fennimore Store (Kent County, Delaware)
First Congregational Church in Stoneham (Middlesex County, Massachusetts)
First District Schoolhouse (Litchfield County, Connecticut)
One-room schoolhouse on the Harwinton Consolidated School grounds in Harwinton.
First Parish Church (Plymouth County, Massachusetts)
Fitz Randolph-Rogers House (Butler County, Ohio)
Flint River Place (Madison County, Alabama)
Follett House (Chittenden County, Vermont)
Fort Atkinson (Winneshiek County, Iowa)
Ruins of fort built to protect the Ho-Chunk (Winnebago)
Fort Greene Historic District (Kings County, New York)
Foscue-Whitfield House (Marengo County, Alabama)
A historic Federal style house just outside the city limits of Demopolis, Alabama.
Frederick County Courthouse (Frederick County, Virginia)
French Legation (Travis County, Texas)
Gen. David Thomson House (Pettis County, Missouri)
George Neale Jr. House (Wood County, West Virginia)
George Short House (Muhlenberg County, Kentucky)
Glenville (Greene County, Alabama)
A historic house in Eutaw, Alabama.
Gordon-Lee House (Walker County, Georgia)
Grace Church (Cumberland County, Virginia)
Griffith Breese Farm (Allen County, Ohio)
Groveport Town Hall Historic Group (Franklin County, Ohio)
Guerry-Mitchell House (Sumter County, Georgia)
Hamilton-Ickes House (Jefferson County, Ohio)
Hampstead (Yates County, New York)
Hanson House (Lucas County, Ohio)
Harlem Plantation House (Plaquemines Parish, Louisiana)
Harrison Grist Mill (St. Lawrence County, New York)
Harry Fischel House (Greene County, New York)
Haywood English Family Log House (Habersham County, Georgia)
Henry Martin Farm (Brown County, Ohio)
Hermitage Motor Inn (Grant County, West Virginia)
Hessinger Store (Sullivan County, New York)
Highlands Historic District (Bristol County, Massachusetts)
Highwater Rock (Linn County, Iowa)
Hines House (Warren County, Kentucky)
Hopper, Isaac T., House (New York County, New York)
Housatonic Railroad Tunnel (Fairfield County, Connecticut)
A rock tunnel near the summit of the Housatonic RR grade at Hawleyville.
House at 1413 Lafayette St. (Lafayette County, Missouri)
House at 193 Vernon Street (Middlesex County, Massachusetts)
Howard Tunnel, Northern Central Railway (York County, Pennsylvania)
Hudson Avenue Historic District (Licking County, Ohio)
Inglenook Aqueduct (Dauphin County, Pennsylvania)
Three-span stone arch bridge over Powell Creek on PA 147
Isaiah Garrett Law Office (Ouachita Parish, Louisiana)
Israel Stowell Temperance House (Walworth County, Wisconsin)
James Johnston House (Williamson County, Tennessee)
James P. White House (Waldo County, Maine)
John Bell Farm (Chester County, Pennsylvania)
John J. Yeager House (Wood County, Ohio)
John Mask Peace House (Granville County, North Carolina)
John Street Building No. 170--176 (New York County, New York)
Jose Castro House (San Benito County, California)
Judge John Ryon House (Tioga County, Pennsylvania)
Kahal Kadosh Beth Elohim Synagogue (Charleston County, South Carolina)
Katie Plantation House (St. Martin Parish, Louisiana)
Kenneth McKinnon House (Robeson County, North Carolina)
Kiels-McNab House (Barbour County, Alabama)
King--Dennis Farm (Wayne County, Indiana)
Kingsbury--Whitaker House (Norfolk County, Massachusetts)
Knipe--Johnson Farm (Montgomery County, Pennsylvania)
Kreiderville Covered Bridge (Northampton County, Pennsylvania)
LeBeuf Plantation House (Orleans Parish, Louisiana)
Lefferts-Laidlaw House (Kings County, New York)
Supposedly one of the most haunted residences in New York
Leinkauf Historic District (Mobile County, Alabama)
Leslie--Alford--Mims House (Wake County, North Carolina)
Liberty Hill Historic District (Kershaw County, South Carolina)
Lindens, The (Charles County, Maryland)
Lion, The (locomotive) (Washington County, Maine)
Locust Grove (Charlottesville, Virginia)
Lorillard Snuff Mill (Bronx County, New York)
Madden's Tavern (Culpeper County, Virginia)
Magnolia Grove (Hale County, Alabama)
A historic Greek Revival mansion in Greensboro, Alabama.
Magnolia Plantation (Natchitoches Parish, Louisiana)
Maple Lawn Farm (Tioga County, New York)
Marianna Historic District (Jackson County, Florida)
Mark Sappington House (St. Louis County, Missouri)
Market Hall and Sheds (Charleston County, South Carolina)
Marshall's Grove (Dallas County, Alabama)
Mathew H. Ritchey House (Newton County, Missouri)
Mathis House (Stewart County, Georgia)
McClelland Homestead (Lawrence County, Pennsylvania)
McFarlane-Bredt House (Richmond County, New York)
McGavock--Gatewood--Webb House (Davidson County, Tennessee)
McLeod Family Rural Complex (Moore County, North Carolina)
McNamar-McLure-Miller Residence (Licking County, Ohio)
Merritt--Ragan House (Pulaski County, Georgia)
Middlefield-Becket Stone Arch Railroad Bridge District (Unspecified county, Massachusetts)
Mill Creek Friends Meetinghouse (New Castle County, Delaware)
Miller House (Webster Parish, Louisiana)
Mixter Blacksmith Shop (Warren County, New York)
Morel-Nott House (St. Tammany Parish, Louisiana)
Mountain View (Pittsylvania County, Virginia)
Mt. Airy (Augusta County, Virginia)
Mt. Hygeia Schoolhouse (Providence County, Rhode Island)
Abandoned one-room schoolhouse built in 1840 and last open in 1952
Mystic Bridge Historic District (New London County, Connecticut)