National Natural Landmark
The National Natural Landmarks (NNL) Program recognizes and encourages the conservation of outstanding examples of the natural history of the United States. It is the only national natural areas program that identifies and recognizes the best examples of biological and geological features in both public and private ownership. The program was established on May 18, 1962, by United States Secretary of the Interior Stewart Udall.
The Trona Pinnacles with National Natural Landmark sign
Shiprock National Natural Landmark
Wissahickon Valley plaque in Philadelphia near Valley Green Inn
Image: Fagatogo Dock
The National Park Service (NPS) is an agency of the United States federal government, within the U.S. Department of the Interior. The service manages all national parks; most national monuments; and other natural, historical, and recreational properties, with various title designations. The United States Congress created the agency on August 25, 1916, through the National Park Service Organic Act. Its headquarters are in Washington, D.C., within the main headquarters of the Department of the Interior.
In 1934, a series of ten postage stamps was issued to commemorate the reorganization and expansion of the National Park Service.
NPS Preliminary Survey party, Great Smoky Mountains, 1931
Grand Canyon National Park, south rim of canyon.
Customs House at the Salem Maritime National Historic Site in Salem, Massachusetts
