One of the most fun dives that I participate in each year is the treasure dive at the Mine at Bonne Terre. Not only is the mine at Bonne Terre one of the most unique and interesting dives to do in the midwest, the treasure dive gives you an introduction to cavern diving on the precipice of diving to collect poker chips that can be used to bid with during an auction for prizes that includes awesome dive trips and equipment.......I highly recommend this dive for everyone!
http://www.bonneterremine.com/