Not only was this one of the earliest lead mines in Missouri, it was also the world's largest producer of lead ore. The mining began in 1860 and continued until 1962. Now you can dive the mine and participate in the exciting annual Treasure Hunt. On Saturday you will do 2 dives, hunting for tokens within the mine. After your dives, you can enjoy some fun above ground where there will be live music, games to play, and several vendors showing off their destinations and gear. Each vendor will offer special event discounts as well. A delicious BBQ dinner will be served and the auction will follow. Here you can use the tokens you found in the mine to bid on over $30,000 of "treasure" that has been donated by the vendors. You could win a fabulous liveaboard dive trip and other cool dive gear.