Join host Leslie Mueller as she visits an underground zinc mine in Ogdensburg, New Jersey at The Sterling Hill Mining Museum. A National Historic Site and considered the florescent mineral capital of the world, this mine has 35 miles of tunnels. See where workers gathered each morning in the old mill building, visit an underground lake, see tunnels that glow with florescent zinc ore and see the nearby outdoor pit where a huge slab of fluorescent zinc ore was removed for permanent display at the American Museum of Natural History in NYC.