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"Ringing the Wild Horse" Site (Oklahoma County, Oklahoma)
1790 Footprints (Hawaii County, Hawaii)
Abo (Torrance County, New Mexico)
Acadian Landing Site (Aroostook County, Maine)
Adirondack Forest Preserve (Unspecified county, New York)
Afton Villa Gardens (West Feliciana Parish, Louisiana)
Alabama Iron Works (Franklin County, Alabama)
Alaska Totems (Ketchikan Gateway Borough, Alaska)
Aldridge Sawmill (Jasper County, Texas)
Alliance Furnace (Fayette County, Pennsylvania)
Antelope Hills (Roger Mills County, Oklahoma)
Apalachicola Fort (Russell County, Alabama)
An archaeological site near Holy Trinity, Alabama.
Archeological Site No. 1LA102 (Lawrence County, Alabama)
Arnold Trail to Quebec (Kennebec County, Maine)
Bandit Rock (Unspecified county, California)
Barnegat Historic Complex (Washtenaw County, Michigan)
Bear Butte (Meade County, South Dakota)
Beattie's Prairie (Delaware County, Oklahoma)
Belle's Tavern (Barren County, Kentucky)
Bering Expedition Landing Site (Valdez-Cordova Census Area, Alaska)
Bertrand Site (Washington County, Nebraska)
Big Gap Flume (Mariposa County, California)
Big Ram Site (Androscoggin County, Maine)
Birdcraft Sanctuary (Fairfield County, Connecticut)
Boyd Mill Ruins (Williamson County, Tennessee)
Bradys Bend Iron Company Furnaces (Armstrong County, Pennsylvania)
Brick Mill Site (Blount County, Tennessee)
Broderick-Terry Dueling Place (San Mateo County, California)
Brooks-Dixon Waterwheel (Eagle County, Colorado)
Brule-St. Croix Portage (Douglas County, Wisconsin)
Buena Vista Cotton Gin (Claiborne County, Mississippi)
Bull Pasture (Pima County, Arizona)
C. Varney Site (Androscoggin County, Maine)
Caldron Linn (Unspecified county, Idaho)
California Hill (Keith County, Nebraska)
Camp Lincoln (Del Norte County, California)
Campbell Pioneer Cemetery (Iowa County, Iowa)
Carrick Furnace (Franklin County, Pennsylvania)
Cascade Distillery Site (Coffee County, Tennessee)
Cat Rock Sluice of the Roanoke Navigation (Campbell County, Virginia)
Cavalry Corrals (Pima County, Arizona)
Cave Springs Cowboy Camp (San Juan County, Utah)
Cedar Snags (Shoshone County, Idaho)
Chalk Cliff and Republican River (Webster County, Nebraska)
Charbonier Bluff (St. Louis County, Missouri)
Cherokee Path, Sterling Land Grant (Calhoun County, South Carolina)
Chinook Point (Pacific County, Washington)
Citadel Rock (Chouteau County, Montana)
City of Rocks (Cassia County, Idaho)
Col. William Crawford Capture Site (Crawford County, Ohio)
College of California (Site) (Alameda County, California)
Congo Square (Orleans Parish, Louisiana)
Continental Powder Works at French Creek (Chester County, Pennsylvania)
Cook Landing Site (Kauai County, Hawaii)
Cooksville Mill and Mill Pond Site (Rock County, Wisconsin)
Cooper Ridge Lookout Tree (Coconino County, Arizona)
Corral de Piedra (San Luis Obispo County, California)
Corral Lake Lookout Tree (Coconino County, Arizona)
Court of Honor (Milwaukee County, Wisconsin)
A collection of statues in the Wisconsin Avenue esplanade near the Central Library
Coventry Parish Ruins (Somerset County, Maryland)
Cow Island Landing Skirmish Site (Blaine County, Montana)
Croswell--Parsons Paper Mill Ruin (Greene County, New York)
Cullars Rotation (Lee County, Alabama)
The oldest ongoing cotton fertility experiment in the United States, the oldest soil fertility experiment in the Southern United States, and the second oldest continuous cotton experiment in the world.
Cushnoc Archeological Site (Kennebec County, Maine)
David Caldwell Log College Site (Guilford County, North Carolina)
De Mores Packing Plant Ruins (Billings County, North Dakota)
Delbar Products, Inc. (Bucks County, Pennsylvania)
DeLeon Plaza and Bandstand (Victoria County, Texas)
Denis Julien Inscription (Moffat County, Colorado)
Denis Julien Inscription (Grand County, Utah)
Dennis, William, Pottery Kiln and House Site (Durham County, North Carolina)
Desolation Canyon (Unspecified county, Utah)
Devil's Elbow (Whatcom County, Washington)
Devils Head Site (Washington County, Maine)
DEW Radar training site (Livingston County, Illinois)
Air Force radar technician training site for Distant Early Warning personnel
Doe-Kag-Wats (Kitsap County, Washington)
Droemer Brickyard Site (Lee County, Texas)
Dunlawton Plantation--Sugar Mill Ruins (Volusia County, Florida)
Dunn Gardens (King County, Washington)
Dunn Ranch, Novillo Line Camp (Kleberg County, Texas)
Ebenezer Campground (Howard County, Arkansas)
El Cerro Tome Site (Valencia County, New Mexico)
El Tiradito (Pima County, Arizona)
Elephant Butte Dam (Sierra County, New Mexico)
Emigration Canyon (Salt Lake County, Utah)
Estudillo Home (Site) (Alameda County, California)
Eureka Lilly Headframe (Utah County, Utah)
Expedition Island (Sweetwater County, Wyoming)
Experimental Mine, U.S. Bureau Of Mines (Allegheny County, Pennsylvania)
Farallone Islands (San Francisco County, California)
Farm Creek Section (Tazewell County, Illinois)
Farmington Town Pound (Strafford County, New Hampshire)
Farrar Distillery (Coffee County, Tennessee)
Fawn River State Fish Hatchery (Steuben County, Indiana)
First Peoples Buffalo Jump (Cascade County, Montana)
Florence Wagon Works Site (Lauderdale County, Alabama)
Forest Hills Country Club (Wayne County, Indiana)
Fort Caswell Rifle Range (Brunswick County, North Carolina)
Fort Crawford Military Hospital (Crawford County, Wisconsin)
Fort DeRussy (Avoyelles Parish, Louisiana)
Fort Janesville (Lassen County, California)
Fort Miamis Site (Lucas County, Ohio)
Land formation
Fort Mims Site (Baldwin County, Alabama)
Fort Mountain (Murray County, Georgia)
Fort Nez Perce-Old Fort Walla Walla (Walla Walla County, Washington)
Fur trading post established in 1818 abandoned in 1850
Fort Okanogan, Sites of (Okanogan County, Washington)
Fort Phil Kearny and Associated Sites (Johnson County, Wyoming)
Fort St. Charles Archeological Site (Lake of the Woods County, Minnesota)
Abandoned in 1749, Rediscovered in 1908, Reconstructed in the 1950s
Fort Strother Site (St. Clair County, Alabama)
Fort Ter-Wer (Del Norte County, California)
Fort Tombecbe (Sumter County, Alabama)
Was a stockade fort located on the Tombigbee River near the border of French Louisiana, in what is now Sumter County, Alabama.
Fort Winnebago (Columbia County, Wisconsin)
One of three fortifications built by the army in Wisconsin along the river waterways.
Founders' Rock (Alameda County, California)
Fracas Lookout Tree (Coconino County, Arizona)
Frenchtown Historic Site (Walla Walla County, Washington)
GAPA Launch Site and Blockhouse (Tooele County, Utah)
Garber Grove (Webster County, Nebraska)
Gatecliff Rockshelter (Nye County, Nevada)
Genesee Woolen Mill Site (Waukesha County, Wisconsin)
Geodetic Center of the United States (Osborne County, Kansas)
George Ray's Dragstrip (Greene County, Arkansas)
Glendora Bougainvillea (Los Angeles County, California)
Grand Island FCC Monitoring Station (Hall County, Nebraska)
Grand Portage of the St. Louis River (Carlton County, Minnesota)
Grandview Lookout Tree (Coconino County, Arizona)
Gray's Inn (Todd County, Kentucky)
Green River Ordnance Plant (Lee County, Illinois)
Army ammunition plant 1942-1945, various bunkers & buildings still in use by private companies
Gregory Buttes Stone Steps (Gregory County, South Dakota)
Guevavi Mission Ruins (Santa Cruz County, Arizona)
Guillem's Graveyard (Siskiyou County, California)
Site of Modoc War military cemetery
Halekii-Pihana Heiau (Maui County, Hawaii)
Halm Creek, Bean Creek Fire (Shoshone County, Idaho)
Hangman Crossing (Jackson County, Indiana)
Location of two vigilante lynchings of members of the notorious Reno Gang
Height of Land (Cook County, Minnesota)
Hickory Ground (Elmore County, Alabama)
Highlands Historic Village (Macon County, North Carolina)
Hiram F. Smith Orchard (Okanogan County, Washington)
Historic Nacoochee Valley (White County, Georgia)
Homestake Airway Beacon (Jefferson County, Montana)
Hopewell Furnace National Historic Site (Berks County, Pennsylvania)
Hopewell Furnace National Historic Site (Chester County, Pennsylvania)
Horseshoe Mound (Scioto County, Ohio)
Hull Tank Lookout Tree (Coconino County, Arizona)
Hunter Site (Sagadahoc County, Maine)
Hunter's Ironworks (Stafford County, Virginia)
Illinois Campground (Cherokee County, Oklahoma)
Initial Rock (Billings County, North Dakota)
Inscription Rock (Navajo County, Arizona)
Interior Grain Tramway (Whitman County, Washington)
Iron Nation's Gravesite (Lyman County, South Dakota)
Irvings Castle (Payne County, Oklahoma)
Jackson Iron Company Site (Marquette County, Michigan)
Jackson's Reserve (Webster County, Nebraska)
Janney Furnace (Calhoun County, Alabama)
Jesse James Historical Site (Guthrie County, Iowa)
John Corson, Jr. House Site (Cape May County, New Jersey)
John Hackney Mill Site (Blount County, Tennessee)
John Houstoun McIntosh Sugarhouse (Camden County, Georgia)
Kahaluu Fish Pond (Honolulu County, Hawaii)
Kalepolepo Fishpond (Maui County, Hawaii)
Kamiakin's Gardens (Yakima County, Washington)
Kenilworth Aquatic Gardens (Washington, District of Columbia)
Kilauea Crater (Hawaii County, Hawaii)
Knight Grain Elevator (Juab County, Utah)
Knorr--Holden Continuous Corn Plot (Scotts Bluff County, Nebraska)
Kukaniloko Birth Site (Honolulu County, Hawaii)
La Verendrye Site (Stanley County, South Dakota)
LaFollette Coke Ovens (Campbell County, Tennessee)
Lamar Porter Athletic Field (Pulaski County, Arkansas)
Launch Complex 33 (Dona Ana County, New Mexico)
Launch Complex 39 (Brevard County, Florida)
Lewis and Clark Salt Cairn (Clatsop County, Oregon)
Liberty Hill (Los Angeles County, California)
California State Historical Landmark about labor right for dock workers.
Lime Kiln Bottom (Baltimore County, Maryland)
Little American Mine (Koochiching County, Minnesota)
Little Blue Battlefield (Jackson County, Missouri)
Little Mountain Lookout Tree (Coconino County, Arizona)
Little Rock, The (Pulaski County, Arkansas)
Loaloa Heiau (Maui County, Hawaii)
Long Cane Massacre Site (McCormick County, South Carolina)
Los Coches Rancho (Monterey County, California)
Lost Canyon Cowboy Camp (San Juan County, Utah)
Louisiana Purchase Survey Marker (Unspecified county, Arkansas)
LSU Campus Mounds (East Baton Rouge Parish, Louisiana)
Magruder Plots (Payne County, Oklahoma)