National Park Service (DOI) (NPS)
HQ: Washington, D.C.
Other locations: Maintains seven regional offices; an interpretive design center in Harpers Ferry, WV; and a service center in Denver, CO, for park design and construction of facilities. Encompasses more than 380 sites across the United States, Guam, Saipan, Samoa, Puerto Rico, and the Virgin Islands.
Mission: To promote and regulate the use of national parks in order to conserve scenery, natural and cultural resources, historic objects and wildlife for the enjoyment, education, and inspiration of this and future generations.