From the famous Kubla Kahn formation at Kartchner Caverns to the deep history of Colossal Cave, here's what to know about 10 thrilling Arizona caves.

Lava River Cave opens for the season in a week on Friday, May 16. This season, Lava River Cave will be open to the public from mid-May through mid-September.

We travel to Flagstaff and Pinetop to hike from deep underground to the top of a fire watch station.

Lava River Cave is ranked #9 out of 15 things to do in Bend. See pictures and our review of Lava River Cave.