Cave of the Mounds was accidentally discovered on August 4, 1939. Workers removing high-quality limestone from a quarry on the Brigham Farm blasted into the Cave. The cave itself is more than a million years old and the rock it is formed in is over 400 million years old!

A walk down our geologic timeline will take you on a journey to understand how the earth developed – both above and below ground. Along the way, there are rocks, fossils, plants, and other activities which will bring the wonders of geology to you.