Crystal Cave is Wisconsin's LONGEST Cave.  Providing not only cave tours and Sinkhole Nature Trail, they offer fun in the water mining sluice at Prospector's Creek mining real gems.

Crystal Cave will exchange the Cave Voucher given to winning bidder for 4 Gem Panning Prospecting Bags.  Pour a portion of your bag into your gem pan, screen and slide it through the mining sluice. Real gems or fossils will appear and will be yours to keep. You might find crystal points, pyrite, garnets, amethyst, and more. A gem identification card is included with each bag of mining rough.