Natural limestone forms Cave of the Mounds

The Cave is at a constant 50-degree temperature year-round.

Located in Blue Mound, Wisconsin, Cave of the Mounds has been welcoming visitors since 1940. The cave was discovered during a quarry blast on August 4, 1939. Since its discovery, it has been a destination to promote conservation and appreciation of our nation’s natural heritage.

Cave of the Mounds is home to many varieties of speleothems.

In 1988, the United States Department of the Interior and the National Park Service designated the cave as a National Natural Landmark. Its unique character and rare formations date back over 400 million years to the Ordovician Period of the earth’s geologic history.

Cave of the Mounds is known as the “Jewel Box of Caves” in the Midwest because of its color and intricate formations. It’s a great place to explore on a day trip.

The self-paced tour through the cave allows visitors to explore at their leisure. Signage explains the science and history of the colorful crystal formations.