There’s No Attraction In The World Like This One In Iowa
The Crystal Lake Caves in Dubuque are one of Iowa’s most unique and beautiful natural attractions. The Crystal Lake geology was formed over millions of years as slow-moving groundwater carved the cave out of layers of limestone. As the water became acidic, it seeped through the ground and created the walkways that visitors can now walk to get a closer look at the unique sights within the caves.
Crystal Lake Cave is located five miles south of Dubuque on Highway 52.