Finley-Holiday Films. DVD. On the Historic, Frozen Niagara and Wild Cave tours, see Gothic, Boone and Cleveland Avenues, Broadway, Mammoth Dome, Crystal Lake, Echo River, River Styx, the Rotunda and the saltpeter mines. Rangers explain the role of water in the cave system. See eyeless fish and cave crickets and learn how their habitats are explored. 75 minutes DVD BONUS FEATURES: ? Cave Geology Theater Film This video short story is the same fascinating geology film that is shown in the Mammoth Cave National Park visitor center as the orientation film. Produced by David Brinkley and Kentucky Educational Television, it features amazing computer graphics on how Mammoth Cave came to be. ? Wild Cave Tour video This second bonus video takes you on an "off-the-beaten-path" cave expedition into the wilder parts of Mammoth Cave. Watch as a group of would-be spelunkers climb, crawl and squeeze their way into the darkness.