Mammoth Cave Curiosities: A Guide to Rockphobia, Dating, Saber-Toothed Cats, and Other Subterranean MarvelsSir Elton John, blind fish, the original Twinkie, President Ronald Reagan's Secret Service detail, and mummies don't usually come up in the same conversation unless you're at Mammoth Cave National Park! Home to the earth's longest known cave system, this UNESCO World Heritage Site is one of the oldest tourist attractions in North America. Although this remarkable place has been immortalized in works ranging from Herman Melville's Moby Dick to H. P.