If you are driving to the Grand Canyon from Phoenix, I recommend
stopping at Montezuma Castle National Monument. Montezuma
Castle is located 3 miles off Interstate 17. Use Exit Number
289 and follow the signs. It is definitely worth the visit.
The ruins are only about 300 feet down from the visitors
center. Below is a summary from the National Park Service web
site:
It's not a castle and Montezuma was never here.
Nestled into a limestone recess high above the flood plain of
Beaver Creek in the Verde Valley stands one of the best preserved
cliff dwellings in North America. The five-story, 20-room cliff
dwelling served as a "high-rise apartment building" for
prehistoric Sinagua Indians over 600 years ago. Early settlers to
the area assumed that the imposing structure was associated with
the Aztec emperor Montezuma, but the castle was abandoned almost a
century before Montezuma was born.
With heightened concern over vandalism of fragile southwestern
prehistoric sites, Montezuma Castle became a major factor in the
nation's historic preservation movement with its proclamation as a
national monument. The Castle was described in the December 1906
establishment proclamation as "of the greatest ethnological
and scientific interest."1
1 National Park Service, Montezuma
Castle National Monument, accessed on 16 April
2002, available from http://www.nps.gov/moca/index.htm