Driving time from Chicago: One hour
Indiana Dunes National Park, the closest national park to Chicago, is best enjoyed in the summer, when the weather is warm and visitors can spend all day at the beach. That doesn’t mean it should be passed up in the fall, though. It might be a little too chilly to frolic in the waves at the park, which is an hour away from Chicago, so walk along the shore and take in the foliage surrounding the dunes, or embark on one of the park’s many hiking trails.