Camp David. This is the Wikipedia article which covers the history and current useage of this famous Presidential retreat located in Maryland.
From the site:
The Naval Support Facility Thurmont, popularly known as Camp David, is the rustic 125 acre (0.5 km²) mountain retreat of the President of the United States. Camp David is part of the Catoctin Mountain Park recreational area in Frederick County, Maryland, outside Washington.
Catoctin Mountain Park was originally submarginal land purchased by the U.S. government in 1936, to be developed into a recreational facility. The purpose of the land was to demonstrate how rough terrain and eroded soil could be turned into productive land.
During the New Deal program of President Franklin D. Roosevelt, the Works Progress Administration began the work in the newly created Catoctin Recreational Demonstration Area, joined by the Civilian Conservation Corps in 1939. Camp Misty Mount was first used by the Maryland League for Crippled Children. After the first year (1937), the League moved to a second camp, Camp Greentop, because Camp Misty Mount's terrain was difficult to negotiate in a wheelchair. A third camp, Camp Hi-Catoctin, was completed in the winter of 1938-1939 and was used for three years as a family camp for federal employees.