United States Park Police
- Unit of the NPS with jurisdiction in all National Park Service areas and certain other Federal/State lands. Site provides information about history, authority, career qualifications, divisions, and community outreach programs.
- http://www.nps.gov/uspp/

Northeast Regional Office of the National Park Service
- Carries out the National Park Service's mission to thirteen northeastern states ranging from Maine to the Appalachian Mountains, and from the coastal barrier islands to the subalpine summits.
- http://www.nps.gov/nero/

NatureNet:The National Park Service's Natural Resource Place on the Web
- Links to information on the air, geology, water, wildlife and plants in the U.S. National Park System.
- http://www.nature.nps.gov/

National Historic Landmark Program
- Preservation Training Seminars involves balancing an institution's mission with the preservation of historic resources to continued use of a historic structure while retaining character-defining features.
- http://www.nps.gov/phso/conferences

National Park Service Links to the Past
- Showcases programs and products concerned with America's cultural resources from the National Center for Cultural Resources and across the National Park Service.
- http://www.cr.nps.gov/

The National Parks: Shaping the System
- This is an on-line book about the history and ideals of the National Park Service.
- http://www.cr.nps.gov/history/online_books/mackintosh1/