Located about 30 miles southeast of downtown Tucson in Vail, Arizona, Colossal Cave Mountain Park is open daily from 8 a.m. to 4 p.m. Cave tours are offered from 10 a.m. to 2 or 3 p.m. daily.

The Tucson Mountains have served as a destination for mine exploration for centuries but with minimal commercial profit. The range hosts one of the earliest mining districts in Arizona, out of 246 ...