The List of U.S. national parks reference article from the English Wikipedia on 24-Jul-2004
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List of U.S. national parks

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All United States National Parks and National Monuments are maintained by the United States National Park Service which also maintains several other types of protected areas of the United States:

Table of contents
1 National Parks
2 National Monuments
3 National Historical Parks, Memorials, and Battlefields
4 National Recreation Areas, Lakeshores, Seashores and Trails
5 Other NPS Preserves and Protected Areas

National Parks

Disbanded National Parks

National Monuments

National Historical Parks, Memorials, and Battlefields

National Recreation Areas, Lakeshores, Seashores and Trails

Other NPS Preserves and Protected Areas

The National Park Service also administers some National Wild and Scenic Rivers while the Bureau of Land Management, U.S. Forest Service, U.S. Fish and Wildlife Service and various state or local agencies administer other rivers.