Penn's Cave is America's only all-water cavern and farm-nature-wildlife park. They offer the most unique experiences the whole family will love, including a fully-guided cavern tour by boat, a beautiful farm to enjoy nature and wildlife, an off-road mountain tour, gemstone panning, and more. Miners can purchase bags of pre-mixed gem sand and take them outside to Prospector Pete's Sluice to begin your gem-panning experience. Each bag contains semi-precious stones from around the world, fossils or arrowheads.