After emerging from the Big Room, we walked a bit on a nature trail. These buildings were built by the Civilian Conservation Corps and look particularly Southwestern.
This awesome sign was a warning before the hike down to the cavern from the surface, which is over a mile and 750 feet(!) down. We took the elevator instead.
This sign was next to it. It was confusing - by "official cavern guides", does it mean "official cavern audiotours"? That aside, the headphones really added to the sign :-)
As we were walking through the museum, suddenly we heard a noise and this scene came to life! After the smoke started coming out I ran to get my picture taken with it :-)