Crystal Lake Cave

6684 Crystal Lake Cave Road
Dubuque, IA 52003

563-556-6451

In 1868 lead miners drilled 40 feet into the ground to find traces of a rich lead vein. In this process they found very little lead, but instead discovered a natural geological wonder of matchless beauty. In 1932, the late Bernard Markus, (one of the original lead miners),  opened the cave to the public, naming it Crystal Lake Cave.

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