Features:
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- Ugly Duckling (Yacht) (1)
- Ulster and Delaware Railroad. (3)
- Umbrellas. (4)
- Umbria (Freighter) (3)
- Umbria (Ocean liner) (1)
- Uncas (Schooner) (1)
- Uncas (Ship) (1)
- Uncle Sam (Gas steamboat) (1)
- Uncle Sam (Steamboat) (1)
- Union Dime Savings Bank. (1)
- Union League Club (New York, N.Y.) (1)
- Union Station (New Orleans, La.) (1)
- Union Station (Portland, Me.) (1)
- Union Station (Washington, D.C.) (2)
- Union Steamboat Line. (1)
- Unitarian Universalist churches. (6)
- United Empire (Steamboat) (1)
- United States ÏbMichigan ÏdDetroit. (3)
- United States (Frigate) (1)
- United States (Steamboat) (5)
- United States Capitol (Washington, D.C.)--Statuary Hall. (1)
- United States Capitol (Washington, D.C.) (33)
- United States Custom House (New Orleans, La.) (2)
- United States Custom House (New York, N.Y.) (1)
- United States Custom House (Philadelphia, Pa.) (1)
- United States Customs House (Charleston, S.C.) (1)
- United States Customs House (Norfolk, Va.) (1)
- United States Military Academy. (40)
- United States Mint (New Orleans, La.) (1)
- United States Naval Academy--Buildings. (9)
- United States Naval Academy. (60)
- United States Naval Hospital (New York, N.Y.) (16)
- United States Soldier's and Airmen's Home (Washington, D.C.) (1)
- United States Soldiers' and Airmen's Home. (1)
- United States Steel Corporation. (1)
- United States--Alabama--Birmingham. (17)
- United States--Alabama--Ensley. (2)
- United States--Alabama--Mobile. (72)
- United States--Alabama--Montgomery. (17)
- United States--Alabama--Tuskegee. (10)
- United States--Arizona--Adamana. (2)
- United States--Arizona--Canyon De Chelly National Monument. (2)
- United States--Arizona--Grand Canyon. (16)
- United States--Arizona--Petrified Forest National Park. (2)
- United States--Arizona. (22)
- United States--Arkansas--Hot Springs. (39)
- United States--Arkansas--Little Rock. (23)
- United States--Atlantic Ocean. (4)
- United States--Atlantic States. (3)
- United States--Blue Ridge Mountains. (28)
- United States--California--Avalon. (21)
- United States--California--Capitola. (1)
- United States--California--Cooper Canyon. (1)
- United States--California--Coronado. (4)
- United States--California--Echo Mountain. (1)
- United States--California--Gaviota. (1)
- United States--California--Glacier Point. (1)
- United States--California--Long Beach. (2)
- United States--California--Los Angeles County--Loew, Mount (1)
- United States--California--Los Angeles County--Lowe, Mount. (5)
- United States--California--Los Angeles. (13)
- United States--California--Los Banos. (1)
- United States--California--Monterey. (4)
- United States--California--Nevada Fall. (1)
- United States--California--Pasadena. (14)
- United States--California--Redlands. (1)
- United States--California--Riverside. (3)
- United States--California--San Bernardino. (2)
- United States--California--San Diego. (4)
- United States--California--San Francisco. (41)
- United States--California--San Gabriel. (2)
- United States--California--San Juan Capistrano. (2)
- United States--California--Santa Barbara. (11)
- United States--California--Santa Catalina Island. (26)
- United States--California--Shasta, Mount. (6)
- United States--California--Sonoma. (1)
- United States--California--Sweetwater Dam. (1)
- United States--California--Vallejo. (1)
- United States--California--Venice. (1)
- United States--California--Wawona. (2)
- United States--California--Wilson, Mount. (1)
- United States--California--Yosemite National Park. (12)
- United States--California--Yosemite Valley. (5)
- United States--California. (171)
- United States--Champlain, Lake. (57)
- United States--Colorado--Abrams Mountain. (1)
- United States--Colorado--Alpine Pass. (1)
- United States--Colorado--Altman. (1)
- United States--Colorado--Animas River. (2)
- United States--Colorado--Arkansas River. (4)
- United States--Colorado--Aspen. (1)
- United States--Colorado--Audubon, Mount. (2)
- United States--Colorado--Buena Vista. (1)
- United States--Colorado--Cathedral Park. (3)
- United States--Colorado--Chattanooga. (1)
- United States--Colorado--Cheyenne Mountain. (1)
- United States--Colorado--Chicago Lakes. (1)
- United States--Colorado--Clear Creek Canyon. (1)
- United States--Colorado--Clear Creek. (2)
- United States--Colorado--Colorado River. (3)