www.nps.gov/

    An extensive guide beginning with the history of national parks,
including information on specific parks, education, and pictures.
This is a good site to gain information on each park, as well as
gathering information on what resources can be found in each park.
The National Park Service web site also contains information necessary
for a park visitor, such as pass information, campsite reservation and
general information you may need.

Comments:
A good resource for the park visitor. Gives great safety tips and offers a place to
Complete reservations and begin planning a trip to a national park such as
Yellow Stone or Yosemite.