1 ► California, Alameda County, Pleasanton — Palm Event Center — Completed May 1, 2004 —

2 ► California, Los Angeles County, Angeles National Forest — The 100-Inch Hooker Telescope — Mount Wilson Observatory —

3 ► California, Los Angeles County, Los Angeles, Downtown Los Angeles — Sylmar Tunnel Disaster — Honoring The Lives —

4 ► California, Los Angeles County, Los Angeles, Elysian Park — 48 — Chavez Ravine Arboretum — Elysian Park Arboretum —

5 ► California, Los Angeles County, Los Angeles, Hancock Park — 94 — Highland Avenue Medians — City of Los Angeles —

6 ► California, Los Angeles County, Los Angeles, Hancock Park — 94 — Highland Avenue Medians — City of Los Angeles —

7 ► California, Los Angeles County, Los Angeles, Northridge — Lauretta Wasserstein Sculpture Garden — “Post-Tension” — Earthquake Garden —

8 ► California, Los Angeles County, Los Angeles, San Pedro — 187 — Korean Friendship Bell —

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9 ► California, Los Angeles County, Los Angeles, Sylmar — 1006 — Beale's Cut — Reported missing

10 ► California, Los Angeles County, Los Angeles, Van Nuys — Van Nuys Airport — In Honor of Pioneer Aviators —

11 ► California, Los Angeles County, Los Angeles, Woodland Hills — 939 — Old Trapper's Lodge —

12 ► California, Los Angeles County, Marina del Rey — The Helmsman —

13 ► California, Los Angeles County, Santa Clarita, Angeles National Forest — Power Plant No. 1 — First Los Angeles Aqueduct —

14 ► California, Los Angeles County, Santa Clarita, Angeles National Forest — St. Francis Dam —

15 ► California, Los Angeles County, Santa Clarita, Angeles National Forest — St. Francis Dam Disaster Site — Reported missing

16 ► California, Los Angeles County, Santa Clarita, Angeles National Forest — 919 — St. Francis Dam Disaster Site —

17 ► California, Los Angeles County, Santa Clarita, Stevenson Ranch — 516 — First Commercial Oil Well In California — Pico #4 —

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18 ► California, Riverside County, Mountain Center — 122 — Historic Lake Hemet Dam —

19 ► California, Riverside County, Riverside, Downtown Riverside — The Nanjing Bell —

20 ► California, Sacramento County, Sacramento, "Old Sacramento" — Sacramento Water Works — Historic Civil Engineering Landmark —

21 ► California, Sacramento County, Sacramento, Old Sacramento — 780 — First Transcontinental Railroad Groundbreaking Site — Reported permanently removed

22 ► California, Solano County, Vallejo — An Island Built of Mud —

23 ► California, Solano County, Vallejo — Mare Island - A Place of "Firsts" —

24 ► California, Solano County, Vallejo — The Carquinez Strait: Gateway to California's Riches —

25 ► California, Solano County, Vallejo — The Western Magazine —

26 ► Connecticut, Hartford County, Farmington, Unionville — An Industrial History of Unionville, 1780-1880 —

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27 ► Connecticut, Hartford County, Farmington, Unionville — The Water Fountain —

28 ► District of Columbia, Washington, Northeast Washington, Kingman and Heritage Islands — Welcome to Kingman & Heritage Islands — Reported damaged

29 ► District of Columbia, Washington, Northeast Washington, Kingman and Heritage Islands — Welcome to Kingman & Heritage Islands —

30 ► District of Columbia, Washington, Northwest Washington, 16th Street Heights — 4 — Crossroads Create Community — Battleground to Community — Brightwood Heritage Trail —

31 ► District of Columbia, Washington, Northwest Washington, The Ellipse — The National Christmas Tree — President's Park — National Park Service, U.S. Department of the Interior — Reported permanently removed

32 ► Florida, Manatee County, Anna Maria — Historic Anna Maria City Pier —

33 ► Florida, Osceola County, Kissimmee — Tree Firemark —

34 ► Florida, Palm Beach County, Jupiter — Jupiter Inlet Lighthouse began protecting ships at sea on July 10, 1860 —

35 ► Florida, St. Johns County, St. Augustine, Historic District — Invincible? / ¿Invencible? — Castillo de San Marcos National Monument —

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36 ► Georgia, Glynn County, Jekyll Island — Preserving the Legacy —

37 ► Georgia, Glynn County, Jekyll Island — Taking Care of Family — Reported permanently removed

38 ► Georgia, Glynn County, Jekyll Island — The Clubhouse — Evolution of Elegance —

39 ► Georgia, Union County, Blairsville — Original Clock & Bell Mechanism — From the Historic 1899 Courthouse —

40 ► Illinois, Hancock County, Warsaw — This Antique Fire Hydrant —

41 ► Illinois, Madison County, Collinsville — Cahokia — City of the Sun —

42 ► Illinois, Massac County, Metropolis — Superman Statue Facts —

43 ► Illinois, Peoria County, Peoria — The Easton Fountain —

44 ► Indiana, Cass County, Logansport — Little Turtle Waterway Plaza —

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45 ► Indiana, Franklin County, Metamora, Metamora Township — Building the Whitewater Canal — an 1840s Engineering Feat —

46 ► Indiana, Franklin County, Metamora, Metamora Township — Locking Thru Lock No. 24 — Welcome to Whitewater Canal State Historic Site — Metamora —

47 ► Indiana, Harrison County, Corydon — Flags Over Corydon —

48 ► Indiana, Ripley County, Versailles — Hitching Post —

49 ► Indiana, White County, Monticello — Courthouse Cast Iron Drinking Fountain —

50 ► Indiana, White County, Monticello — The Black Light Poles —

51 ► Maryland, Cecil County, Chesapeake City — From Creek to Canal —

52 ► Maryland, Cecil County, Conowingo — The Proprietors of the Susquehanna Canal —

53 ► Maryland, Montgomery County, Bethesda, Brookmont — Original Federal Boundary Stone, District of Columbia, Northwest 4 —

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54 ► Maryland, Montgomery County, Silver Spring, Wheaton — Azalea Garden — 1970 — Brookside Gardens: 40 years (1969-2009) —

55 ► Maryland, Montgomery County, Silver Spring, Wheaton — Conservatory — 1969 — Brookside Gardens: 40 years (1969-2009) —

56 ► Maryland, Montgomery County, Silver Spring, Wheaton — Formal Gardens — 1969 — Brookside Gardens: 40 years (1969-2009) —

57 ► Maryland, Montgomery County, Silver Spring, Wheaton — Trial Garden — 1974 — Brookside Gardens: 40 years (1969-2009) —

58 ► Maryland, Prince George's County, Brentwood — Original Federal Boundary Stone, District of Columbia, Northeast 7 —

59 ► Massachusetts, Suffolk County, Boston, East Boston — Islands - Volkan Alkanoglu, 2019 —

60 ► Massachusetts, Suffolk County, Boston, East Boston — View of Boston in 1848. — East Boston — Harborwalk Boston —

61 ► Michigan, Antrim County, Elk Rapids — 548 — The Island House —

62 ► Michigan, Chippewa County, Sault Ste. Marie — Construction of the Power Canal —

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63 ► Michigan, Chippewa County, Sault Ste. Marie — Historic Water Tower — Sault Ste. Marie —

64 ► Michigan, Chippewa County, Sault Ste. Marie — Making a Grand Entrance —

65 ► Michigan, Ingham County, Lansing — The Woman's Christian Temperance Union Fountain —

66 ► Michigan, St. Clair County, Fort Gratiot — What Lies Beneath —

67 ► Michigan, Wayne County, Dearborn — The Path of the Setting Sun —

68 ► Minnesota, Chisago County, Almelund, Wild River State Park — Nevers Dam — 1889–1954 —

69 ► Minnesota, Hennepin County, Minneapolis, Central Minneapolis — 501 — Wesley United Methodist Church — Established in 1852 — United Methodist Church Registered Historic Site No. 501 —

70 ► Mississippi, Grenada County, Grenada — Grenada Dam —

71 ► Montana, Big Horn County, Decker — The Land Speaks — (Rosebud Battlefield/Where the Girl Saved Her Brother) —

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72 ► Montana, Pondera County, Valier — Signs of Home — Lewis & Clark National Historic Trail — National Park Service, U.S. Department of the Interior —

73 ► Montana, Pondera County, Valier — The 546th Missile Squadron —

74 ► Montana, Powell County, Deer Lodge — Beaverslide Haystacker —

75 ► Montana, Powell County, Deer Lodge — Good Fences Make Bad Neighbors? — Grant-Kohrs Ranch National Historic Site —

76 ► Montana, Sanders County, Thompson Falls — Thompson Falls Hydroelectric Dam District — St. Luke's Hospital —

77 ► Montana, Silver Bow County, Butte — Butte Mining Through the Years —

78 ► Montana, Silver Bow County, Butte — Mining The Berkeley Pit 1955-1982 —

79 ► Montana, Silver Bow County, Butte — The Berkeley Pit Threatens the Water —

80 ► Montana, Silver Bow County, Butte — The Berkeley Pit: The Water Returns —

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81 ► Nebraska, Dawson County, Cozad — 17 — The 100th Meridian —

82 ► Nevada, Esmeralda County, Goldfield — 242 — Southern Nevada Consolidated Telephone-Telegraph Company Building — Reported permanently removed

83 ► New Hampshire, Grafton County, Bath — 121 — Bath, New Hampshire —

84 ► New Hampshire, Sullivan County, Washington — Compass Rock —

85 ► New Jersey, Cape May County, Cape May, Lower Township — All Shapes, Sizes and Materials — Aids to Navigation — Maritime History — Reported permanently removed

86 ► New Jersey, Cape May County, Cape May, Lower Township — The Construction of Fort Miles —

87 ► New York, Albany County, Albany — 1816 Dwelling House —

88 ► New York, Albany County, Albany — Brethren's Workshop (1822) —

89 ► New York, Albany County, Albany — Creamery (1856) —

90 ► New York, Albany County, Albany — Ministry Shop (1825) —

91 ► New York, Albany County, Albany — Shaker Garage (1920) —

92 ► New York, Albany County, Albany — Shaker Meeting House —

93 ► New York, Albany County, Albany — Wash House & Cannery (c.1858) —

94 ► New York, Albany County, Albany, Downtown — Academy Park —

95 ► New York, Albany County, Albany, Downtown — City Hall Carillon — Albany 300 - 1686-1986 — Still Making History —

96 ► New York, Albany County, Albany, Mansion Area — Bleecker Park —

97 ► New York, Albany County, Albany, Washington Park — Boats and Music —

98 ► New York, Albany County, Albany, Washington Park — Washington Park — Albany 300 — 1686-1986 • Still Making History —

99 ► New York, Albany County, Altamont — 2 — Altamont Free Library / Biblioteca Libre de Altamonte — Altamont, New York — The Museum In The Streets —

100 ► New York, Albany County, Altamont — Severson House —

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