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Colossal Cave

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16721 E Old Spanish Trail
Tucson, AZ 85641
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The cave is called "dry" or "dormant" which means that, due to a lack of water, the formations are not growing right now.

Colossal Cave, which is on the National Register of Historic Places, had been used for centuries by prehistoric peoples when it was "discovered" in 1879. Since then it has been the object of interest and attention by people ranging from train robbers to a President of the University of Arizona. The first tours were taken through the unimproved Cave in 1923, tours which involved ropes and lanterns.

Thanks to the Civilian Conservation Corps, who constructed the buildings, walkways, and wiring in the mid-1930's, today's tours are very comfortable. The hand-set flagstone walkways and handrails are exactly as installed by the CCC. These days, however, Colossal Cave is wearing new lights and is more breathtakingly beautiful than ever before. (We're proud to say that the lights are energy-saving compact fluorescents.)


Monday: 9am - 5pm
Tuesday: 9am - 5pm
Wednesday: 9am - 5pm
Thursday: 9am - 5pm
Friday: 9am - 5pm
Saturday: 9am - 5pm
Sunday: 9am - 5pm

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