10 pit stops to make on a road trip along I-10 from Arizona to New …

Colossal Cave Mountain Park. | Photo courtesy of Visit Tucson 5. Colossal Cave Mountain Park. Colossal Cave Mountain Park in nearby Vail, Arizona, is a natural wonder that’s home to one of the largest dry caves in the U.S. The cave system has 3.5 miles of mapped passages. Tours guide visitors along a half-mile stretch to view unique …

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