Indiana Dunes National Lakeshore, Indiana

The name "Indiana" doesn't exactly conjure up images of white-sand bays, but at the state's northern edge, past Notre Dame and the industrial towns along the Michigan border, Indiana Dunes National Lakeshore boasts some of the most striking water-frontage in the states. The deserted portions of the beach are a hike away – the reserve boasts 45 miles of trails – and tend toward the dramatic, appearing like frozen sand waves crashing into the cold blue. The area, home to myriad birds and plant species, tends to attract naturalists – also naturists.