Named Colossal Cave, with more than two miles of passageways that have been explored and mapped, it is likely that there are still areas that have never been seen. Tours of the cave, where the ...

Richard Milbauer, top, and Heather Shearer use night-vision modified video cameras to record the Haunted Historians tour of Colossal Cave and the park grounds east of Tucson. Chloe Flanders, left, and ...

Add Yahoo as a preferred source to see more of our stories on Google. Exciting things are happening at Colossal Cave for the first time in decades. The team there has uncovered a few new parts of the ...

The leaseholder for Colossal Cave Mountain Park has updated its procedures and instituted personnel changes after an anonymous letter to the Pima County Board of Supervisors alleged multiple ...