Massive underground caverns and mammoth architecture. The sunken remains of a working mineral mine, complete with equipment, rail tracks, ore carts, elevator shafts and even intact buildings. A billion gallon underground lake with crystal clear water and constant temperatures year round. And miles of underwater trails to explore. Bonne Terre is an adventure for all divers and its right here in our own backyard. Located just 40 minutes south of St. Louis in the foothills of the Ozark Mountains, Bonne Terre is a unique diving experience that will capture your imagination and beckon you back for more. It is truly like a “Dive to the Center of the Earth.” Join Eco-photo Explorers as they journey below ground to explore the underwater treasure that is Bonne Terre.