Harmonie State Park sits along the Wabash River in southwestern Indiana, close to the historic village of New Harmony. That town was settled by the Rappites and later by followers of Robert Owen, two communities that tried to build model societies on the frontier. The park offers forested hills, river views and a range of family-friendly amenities, including a swimming pool and a campground. It is a comfortable base for exploring the trails and the history of the surrounding area. Entry is $7 per vehicle with Indiana plates and $15 for out-of-state vehicles, with camping rates varying by site. Combine a park visit with a stroll through New Harmony's gardens and historic buildings.