Crystal Lake Cave was discovered by miners in 1868 when they were looking for lead near Dubuque, and the cave was eventually opened to the public as a tourist attraction in 1932. Visitors to the cave can participate in a guided tour that takes 30-45 minutes. The temperature inside the cave is always a cool 52°F and the cave itself has many interesting mineral formations, including helictites, stalagmites, rare anthodites, and more. For kids, the Gem Mining Sluice offers a fun chance for young visitors to learn about mining. There is an onsite gift shop and outdoor pavilion, which is great for picnics.
Address: 6684 Crystal Lake Cave Rd, Dubuque, IA 52003, Phone: 563-556-6451
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