Place to see: Colossal Cave Mountain Park, Vail, Arizona, United States

About this place:

Colossal Cave Mountain Park is a county park just outside of Tucson, Arizona. The cave is considered "dry" or "dormant", which means that, due to a lack of water, the cave formations are no longer growing. Although by no means as grandiose as Carlsbad Caverns in New Mexico, Colossal Cave is a fun adventure. To enter the cave you must take a guided tour which lasts about 50 minutes and explores the majority of the cave. Be careful when you go, because it is a very small cave, with many narrow passages and plenty of opportunities to hit your head.