The National Park Service is offering free admission Tuesday at more than a dozen of its sites in Arizona in honor of the state's centennial celebration.
The sites include Casa Grande Ruins, Chiricahua, Montezuma Castle, Organ Pipe Cactus, Pipe Springs, Sunset Crater Volcano, Tonto, Tuzigoot, Walnut Canyon, and Wupatki national Monuments.
The free admission also applies to Grand Canyon, Petrified Forest, and Saguaro national parks; Tumacacori National Historical Park; and Glen Canyon and Lake Mead National recreational areas.
Visitors who plan to remain there beyond Tuesday will have to pay the regular entrance fee for the remainder of their stay.
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