WI Interstate Park is known worldwide for its glacial potholes.  It’s also one end of the 1,200 mile National Ice Age Trail.  It offers beautiful views from bluffs along the St. Croix River, swimming/ fishing/ canoeing at Lake O’ the Dalles, family nature programs, and has over 9 miles worth of hiking trails (as well as ski & snowshoe in the winter).  A Visitor Center provides an auditorium, exhibits and a gift shop.