Beschreibung zu den Nationalparks:

Arches NP
Banff NP
Bryce Canyon NP
Canyonlands NP
Death Valley NP
Denali NP
Everglades NP
Grand Canyon NP
Grand Teton NP
Great Smoky NP
Jasper NP
Joshua Tree NP
Kings a.Sequola NP
Kootenay NP
Olympic NP
Rocky Mountain NP
Shenandoah NP
Waterton_Glacier NP
Yelloston NP
Yoho NP
Yosemite NP
Zion NP