NPR's Howard Berkes has the second of three reports on the new Kartchner Caverns State Park near Tucson, scheduled to open in two weeks. The state of Arizona is spending millions of dollars to prepare the fragile caves for visits by tourists. Some think the presence of visitors is going to inevitably degrade the site, but the developers and discovers of the attraction think exploiting it is the only way to protect it. (8:35)
Take a look at photos of the Caverns at NPR's Kartchner Caverns Web page.