Kohler-Andrae’s landscape is an interesting mix of river marsh, pine and hardwood forests, long beaches and beautiful sand dunes overlooking one of the largest bodies of freshwater on earth — Lake Michigan. Looking at Lake Michigan today, you might think that this huge lake was always here, but it wasn’t. Only during the last two million years when the Ice Age began, did this lake begin to take shape. Lake Michigan was affected by at least four Ice Age glaciers. The last Wisconsin glacier gouged out the present-day Lake Michigan basin.

Wis DNR