Manitoulin Island is part of the Niagara Escarpment, which is cool.

For those unfamiliar with the Niagara Escarpment, it is a line of rocks and such that indicates the furthest that glaciers came during the last ice age. It goes from the Niagara Falls up the Bruce Peninsula, over to Manitoulin Island, around the southern part of Michigan’s Upper Peninsula, and then finally ending at Wisconsin’s Dorr Peninsula.