Espada Aqueduct has been designated a Registered National Historic Landmark under the provisions of the Historic Sites Act of August 21, 1935. This site possesses exceptional value in commemorating and illustrating the history of the United States. U.S. Department of the Interior, National Park Service. 1965.

Espada Rd., east of US 281, San Antonio, TX, United States

Longue Vue House and Gardens has been designated a National Historic Landmark. This site possesses national significance in commemorating the history of the United States of America.

7 Bamboo Road, New Orleans, LA, United States

Memorial Continental Hall has been designated a Registered National Historic Landmark under the provisions of the Historic Sites Act of August 21, 1935. This site possesses exceptional value in commemorating or illustrating the history of the United States.

1776 D Street NW, Washington, DC, United States

Lower Klamath National Wildlife Refuge has been designated a Registered National Historic Landmark under the provisions of the Historic Sites Act of August 21, 1955 This site possesses exceptional value in commemorating and illustrating the history of the United States U.S. Department of the Interior National Park Service 1965

State Line Road, Tule Lake, United States

Point Reyes National Seashore Dedicated by Mrs. Lyndon B. Johnson To the service of the people of the United Status of America U.S. Department of the Interior National Park Service September 20, 1966

Bear Valley Road, Olema, United States