United States National Park - Definition and Overview

The parks of the United States National Park system are one type of protected area in the United States and are operated by the U.S. National Park Service. Yellowstone National Park was the first national park in the world.

See also

• List of U.S. national parks

External link

• A Brief History of the National Park Service (http://www.cr.nps.gov/history/hisnps/NPShistory/briefhistory.htm)