5. Hot Springs National Park, Arkansas
Hot Springs is a rare national park that blends nature with a dose of history and spa-like relaxation. Located in the middle of Hot Springs, Arkansas, it’s the only park with a full-on bathhouse district. The historic Bathhouse Row features eight preserved buildings from the early 1900s, and you can even soak in the warm spring water at two of them. Outside, the park has forested hills, hiking trails, and scenic overlooks. The Grand Promenade is a paved walkway that’s perfect for a peaceful stroll with mountain views. You’ll also find a few natural hot springs tucked away along the trails. It’s a laid-back spot where you can hike in the morning and relax in a tub by the afternoon. And yep, there’s no entrance fee at all.