We toured Kartchner Caverns Thursday. Kartchner just opened up in November, but it's already really popular. Tours are sold out into June. The Caverns were discovered in 1974 by a couple of guys who kept them a secret. In 1978, they clued in the Kartchners, who own the land, and in the 1980s, they brought the state of Arizona in. The neat thing is that since the caves were kept a secret until the state took over, they've never suffered from any vandalism and are in pristine condition. It's a "wet" cave, which leads to some very interesting formations. Unfortunately, they didn't let us take any pictures, but I have a feeling pictures wouldn't capture these amazing formations. Some looked like Cthulhu, but the "cave bacon" was especially neat. It really looks like bacon. Anybody who's in southern AZ should have a look at some really impressive caves...but make your reservations months in advance.