Two different cavern tours are available. The Rotunda/Throne Room tour is available year round. The Big Room tour is offered on October 15th through April 15th to protect a maternity colony of bats which return each summer. If at all possible, try to take both tours as they are quite different.
Cameras, cell phones, etc are not allowed on the tour. I'm sharing a couple of YouTube videos for those who would like a virtual tour.
© 2012 Arizona Highways
© 2009 Arizona State Parks
In addition to the caverns, the park boasts hiking trails and a very nice campground.
View at sunset down to the San Pedro River Valley from the campground. The velvet mesquite are not yet leafing out. Other plants in the campground include barrel cacti, prickly pear, aloe, and yucca.
The below pictures were all made from the Foothill Loop trail
Look hard and you can make out one of two white-tail does we met on the trail. Huxley and I watched her for quite a while, and she held her gaze on us as well.
A view back toward the campground and the valley below.