• Adventure Crew - Source provides pictures, videos, and information regarding many of America's parks, monuments and wilderness areas.
• American Park Network - Publisher of visitor guide magazines offers information on trip planning, reservations and family activities online.
• Mapping the National Parks - Collection documenting the history, cultural aspects and geological formations of areas that eventually became National Parks.
• National Park Directory - Information on location, seasons open, area in acres, major attractions and activities.
• National Park Foundation - Purchase the National Parks Pass, plan a trip, read community opinions or learn about volunteer opportunities.
• National Park Reservations - Offers reservations and information about national parks throughout the U.S. and Canada, including lodging and activities.
• National Park Trust - Land conservancy dedicated exclusively to America's national system of parks, wildlife, scenic wonders and historic monuments.
• National Parks Conservation Association - Resource offers park and wildlife safety, virtual visits, exploration with guides, how to take action and nation involvement.
• National Parks Gallery - Gallery of pictures of some of America's national parks and monuments.
• Personal page by David L. Scott - General introduction to park facilities as well as entrance, camping and lodging fees.
• Public Lands Information Center - Not-for-profit portal affiliated with USDA Forest Service and Bureau of Land Management. Resource for maps, guides, passes, permits, pictures and recreation information for state and federal lands.
• Recreation.gov - Government site provides information about federal recreation areas. Search by state, activity, agency, or by map.
• Untraveled Road: National Parks - Interactively follow roads and trails of many National Parks online.
• US-Parks.com - Guide featuring park descriptions and fees, a lodging directory, trip and activities planning information, books and maps.

 National Park Service

• National Center for Preservation Technology and Training - Interdisciplinary program of the National Park Service to promote and enhance the preservation and conservation of prehistoric and historic resources in the United States for present and future generations through the advancement and dissemination of preservation technology and training.
• 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.
• 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.
• National Park Service: Parknet - Official site, with extensive information on America's National Parks and their management.
• The National Parks: Shaping the System - This is an on-line book about the history and ideals of the National Park Service.
• 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.
• North East National Natural Landmarks Program - recognizes and encourages the conservation of nationally significant natural areas that contribute to the understanding of our country's heritage
• 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.