Well over a hundred national monuments across the United States have been established by different presidents under the authority of the Antiquities Act of 1906. Each monument on the map above is numbered according to the sequence in which it was established. Click on the numbers to learn about national monuments and their histories, and to find links to the monuments’ home pages. Click here for a list of national monuments designated by Congress.
Find out how to visit a national monument from its homepage, or go to the National Park Service's Parks and Recreation page and the Bureau of Land Management's Adventures in the Past page.
1. Devils Tower
Wyoming
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Action | Date | President/ Congress | Acres Affected |
Established | 09/24/1906 | T. Roosevelt | 1,193.91 |
6. Cinder Cone
California
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Action | Date | President/ Congress | Acres Affected |
Established | 05/06/1907 | T. Roosevelt | 5,120 |
Incorporated into Lassen Volcanic NP | 08/09/1916 | 64th Congress |
7. Lassen Volcanic
California
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Action | Date | President/ Congress | Acres Affected |
Established | 05/06/1907 | T. Roosevelt | 1,280 |
Redesignated Lassen Volcanic NP | 08/09/1916 | 64th Congress |
10. Muir Woods
California
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Action | Date | President/ Congress | Acres Affected |
Established | 01/09/1908 | T. Roosevelt | 295 |
Enlarged | 09/22/1921 | W. Harding | 128.14 |
Enlarged | 04/05/1935 | F. Roosevelt | 1.36 |
Enlarged | 06/26/1951 | H. Truman | 504.271 |
Enlarged | 09/08/1959 | D. Eisenhower | 6.16 |
13. Pinnacles
California
Action | Date | President/ Congress | Acres Affected |
Established | 01/16/1908 | T. Roosevelt | 1,320 |
Enlarged | 05/07/1923 | W. Harding | 2,653.46 |
Enlarged | 07/02/1924 | C. Coolidge | 2,980.26 |
Enlarged | 07/11/1933 | F. Roosevelt | 4805 |
Enlarged | 12/05/1941 | F. Roosevelt | 4,589.26 |
Enlarged | 01/11/2000 | W. Clinton | 7,900 |
14. Jewel Cave
South Dakota
State | Date | President/ Congress | Acres Affected |
Established | 02/07/1908 | T. Roosevelt | 1,274.56 |
16. Lewis and Clark Cavern
Montana
Action | Date | President/ Congress | Acres Affected |
Established | 05/11/1908 | T. Roosevelt | 160 |
Boundaries Confirmed | 05/16/1911 | W. Taft | 160 |
Transferred to MT, now a state park | 08/24/1937 | 75th Congress |
19. Mount Olympus
Washington
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Action | Date | President/ Congress | Acres Affected |
Established | 03/02/1909 | T. Roosevelt | 639,200 |
Diminished | 04/17/1912 | W. Taft | 160 |
Diminished | 05/11/1915 | W. Wilson | 313,280 |
Diminished | 01/07/1929 | C. Coolidge | 640 |
Redesignated NP | 06/29/1938 | 75th Congress |
21. Oregon Caves
Oregon
Action | Date | President/ Congress | Acres Affected |
Established | 07/12/1909 | W. Taft | 465.80 |
24. Shoshone Cavern
Wyoming
Action | Date | President/ Congress | Acres Affected |
Established | 09/21/1909 | W. Taft | 210 |
Transferred to WY | 05/17/1954 | 83d Congress |
28. Big Hole Battlefield
Montana
Action | Date | President/ Congress | Acres Affected |
Established | 06/23/1910 | W. Taft | 5 |
Enlarged | 06/29/1939 | F. Roosevelt | 195 |
Redesignated NB | 05/17/1963 | 88th Congress |
30. Devil Postpile
California
Action | Date | President/ Congress | Acres Affected |
Established | 07/06/1911 | W. Taft | 798.46 |
31. Cabrillo
California
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Action | Date | President/ Congress | Acres Affected |
Established | 10/14/1913 | W. Wilson | 0.50 |
Enlarged | 02/02/1959 | D. Eisenhower | 80 |
Enlarged | 09/28/1974 | G. Ford | 56.6 |
36. Sieur de Monts
Maine
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Action | Date | President/ Congress | Acres Affected |
Established | 07/08/1916 | W. Wilson | 5,000 |
Redesignated Lafayette NP | 02/26/1919 | 65th Congress | |
Redesignated Acadia NP | 1930 |
39. Verendrye
North Dakota
Action | Date | President/ Congress | Acres Affected |
Established | 06/29/1917 | W. Wilson | 253.04 |
Transferred to ND | 07/30/1956 | 84th Congress |
42. Scotts Bluff
Nebraska
Action | Date | President/ Congress | Acres Affected |
Established | 12/12/1919 | W. Wilson | 2,053.83 |
Enlarged | 03/29/1940 | F. Roosevelt | 53.34 |
44. Lehman Caves
Nevada
Action | Date | President/ Congress | Acres Affected |
Established | 01/24/1922 | W. Harding | 593.03 |
Incorporated into Great Basin NP | 10/27/1986 | 99th Congress |
46. Fossil Cycad
South Dakota
Action | Date | President/ Congress | Acres Affected |
Established | 10/21/1922 | W. Harding | 320 |
Transferred to BLM | 08/01/1956 | 84th Congress |
49. Mound City Group
Ohio
Action | Date | President/ Congress | Acres Affected |
Established | 03/02/1923 | W. Harding | 57 |
Redesignated Hopewell Culture NHP | 05/27/1992 | 102d Congress |
54. Craters of the Moon
Idaho
Action | Date | President/ Congress | Acres Affected |
Established | 05/02/1924 | C. Coolidge | 22,651.8 |
Enlarged | 07/23/1928 | C. Coolidge | 26,240 |
Enlarged | 07/09/1930 | H. Hoover | |
Diminished | 07/18/1941 | F. Roosevelt | (R.O.W.) |
Enlarged | 11/19/1962 | J. Kennedy | 5360 |
Enlarged under BLM | 11/09/2000 | W. Clinton | 661,287 |
55. Fort Wood
New York
Action | Date | President/ Congress | Acres Affected |
Established | 10/15/1924 | C. Coolidge | 2.5 |
Enlarged | 09/07/1937 | F. Roosevelt | 7.88 |
Enlarged, redesignated Statue of Libery NM | 05/11/1965 | L. Johnson | 48 |
56. Castle Pinckney
South Carolina
Action | Date | President/ Congress | Acres Affected |
Established | 10/15/1924 | C. Coolidge | 3.5 |
Transferred to SC | 03/29/1956 | 84th Congress |
57. Fort Pulaski
Georgia
Action | Date | President/ Congress | Acres Affected |
Established | 10/15/1924 | C. Coolidge | 20 |
Enlarged | 08/14/1958 | D. Eisenhower | 2.5 |
58. Fort Marion
Florida
Action | Date | President/ Congress | Acres Affected |
Established | 10/15/1924 | C. Coolidge | 18.51 |
59. Fort Matanzas
Florida
Action | Date | President/ Congress | Acres Affected |
Established | 10/15/1924 | C. Coolidge | 1 |
Enlarged | 01/09/1935 | F. Roosevelt | 88 |
Enlarged | 03/24/1948 | H. Truman | 209.42 |
61. Meriwether Lewis
Tennessee
Action | Date | President/ Congress | Acres Affected |
Established | 02/06/1925 | C. Coolidge | 50 |
Enlarged | 12/06/1927 | C. Coolidge | 100 |
Included in the Natchez Trace Parkway, now Natchez Trace National Scenic Trail | 08/10/1961 |
63. Father Millet Cross
New York
Action | Date | President/ Congress | Acres Affected |
Established | 09/05/1925 | C. Coolidge | 0.0074 |
Transferred to NY | 09/07/1949 | 81st Congress | |
Now part of Old Fort Niagara State Park |
64. Lava Beds
California
Action | Date | President/ Congress | Acres Affected |
Established | 11/21/1925 | C. Coolidge | 45,589.92 |
Enlarged | 04/27/1951 | H. Truman | 211.13 |
70. Death Valley
Calfornia - Nevada
Action | Date | President/ Congress | Acres Affected |
Established | 02/11/1933 | H. Hoover | 848,581.36 |
Enlarged | 03/26/1937 | F. Roosevelt | 305,920 |
Enlarged | 01/17/1952 | H. Truman | 40 |
Redesignated NP | 10/04/1994 | 103d Congress |
74. Fort Jefferson
Florida
Action | Date | President/ Congress | Acres Affected |
Established | 01/04/1935 | F. Roosevelt | 47,125 |
Redesignated Dry Tortugas NP | 10/26/1992 | 102d Congress |
75. Joshua Tree
California
Action | Date | President/ Congress | Acres Affected |
Established | 08/10/1936 | F. Roosevelt | 825,340 |
Redesignated NP | 10/31/1994 | 103d Congress |
78. Channel Islands
California
Action | Date | President/ Congress | Acres Affected |
Established | 04/26/1938 | F. Roosevelt | 1,119.98 |
Enlarged | 02/09/1949 | H. Truman | 25,918.02 |
Redesignated NP | 05/31/1980 | 96th Congress |
79. Fort Laramie
Wyoming
Action | Date | President/ Congress | Acres Affected |
Established | 07/16/1938 | F. Roosevelt | 214.41 |
Redesignated NHS | 04/29/1960 | 86th Congress |
80. Santa Rosa Island
Florida
Action | Date | President/ Congress | Acres Affected |
Established | 05/17/1939 | F. Roosevelt | 9,500 |
Diminished | 08/13/1945 | H. Truman | 4,700 |
Incorporated into Gulf Islands NS | 07/30/1946 | 79th Congress |
82. Jackson Hole
Wyoming
Action | Date | President/ Congress | Acres Affected |
Established | 03/15/1943 | F. Roosevelt | 210,950 |
Redesignated Grand Teton NP | 09/14/1950 | Slat 81st Congress |
83. Effigy Mounds
Iowa
Action | Date | President/ Congress | Acres Affected |
Established | 10/25/1949 | H. Truman | 1,000 |
84. Edison Laboratory
New Jersey
Action | Date | President/ Congress | Acres Affected |
Established | 07/14/1956 | D. Eisenhower | 1.51 |
Redesignated Edison NHS | 09/05/1962 | 87th Congress |
85. Chesapeake & Ohio Canal
Maryland
Action | Date | President/ Congress | Acres Affected |
Established | 01/18/1961 | D. Eisenhower | 5,263.94 |
Redesignated NHP | 01/08/1971 | 91st Congress |
86. Russell Cave
Alabama
Action | Date | President/ Congress | Acres Affected |
Established | 05/11/1961 | J. Kennedy | 310.45 |
106. California Coastal
California
Action | Date | President/ Congress | Acres Affected |
Established | 01/11/2000 | W. Clinton | 883 |
108. Giant Sequoia
California
Action | Date | President/ Congress | Acres Affected |
Established, incorporated into Sequioa National Forest | 04/15/2000 | W. Clinton | 327,769 |
110. Cascade-Siskiyou
Oregon
Action | Date | President/ Congress | Acres Affected |
Established (BLM) | 06/09/2000 | W. Clinton | 52,000 |
111. Hanford Reach
Washington
Action | Date | President/ Congress | Acres Affected |
Established | 06/09/2000 | W. Clinton | 195,000 |
113.
President Lincoln and
Soldiers' Home
Washington, D.C.
Action | Date | President/ Congress | Acres Affected |
Established | 07/07/2000 | W. Clinton | 2.3 |
115. Carrizo Plain
California
Action | Date | President/ Congress | Acres Affected |
Established (BLM) | 01/17/2001 | W. Clinton | 204,107 |
117. Minidoka Internment
Idaho
Action | Date | President/ Congress | Acres Affected |
Established | 01/17/2001 | W. Clinton | 72.75 |
118. Pompeys Pillar
Montana
Action | Date | President/ Congress | Acres Affected |
Established (BLM) | 01/17/2001 | W. Clinton | 51 |
120. Upper Missouri River Breaks
Montana
Action | Date | President/ Congress | Acres Affected |
Established (BLM) | 01/17/2001 | W. Clinton | 377,346 |
122. Governors Island
New York
Action | Date | President/ Congress | Acres Affected |
Authorized | 01/19/2001 | W. Clinton | 20 |
Established | 02/07/2003 |
123. African Burial Ground
New York
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Action | Date | President/ Congress | Acres Affected |
Established | 02/27/2006 | G. W. Bush | 0.345 |