Lake Forest - including Lake Forest College where Jamie went to college. Foodstuffs is a great lunch option.
Mini golf
Explore beaches along Lake Michigan. Many are private and require a pass by car, but there are walks you can take to access. Let us know if you're interested!
Try an Apple Pancake
Downtown Libertyville has several cute restaurants and shops to walk around to. Main Street Social and Shakou are two restaurant recommendations.