KELLEYS ISLAND, Ohio -- Looking for something "groovy" to explore this summer?
Kelleys Island is home to the largest and most accessible glacial grooves in the entire world.
Located on 3 1/2 acres at the Glacial Grooves State Memorial, visitors can closely view the grooves which are approximately 18,000 years old.
Although they've been studied extensively, there is still no full explanation as to how they were carved. However, it's believed that it may have taken nearly 5,000 years for the glacier, which covered thousands of square miles, to advance from its point of origin to this area in Ohio.