This unique adventure, can be your Dive to the Center of the Earth. Bonne Terre Mine, a national historic site, is the world’s largest fresh water dive resort. Water conditions remain constant with over 100 foot visibility. Sights include: mammoth architecture, guaranteed year round diving conditions, Cal falls, oar carts, scaffolding, grating, staircases, pillars, slurry pipes, the famed elevator shaft,
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