I've visited 39 US national parks. One stands out as the most underrated and unique.
Briefly

Hot Springs National Park stands out among national parks, not only for its stunning natural landscapes but also for its rich historical and wellness offerings, making it a must-visit for diverse interests.
The park's Bathhouse Row consists of eight historical buildings, showcasing the unique blend of health, history, and culture that attracted visitors seeking relaxation in mineral-rich waters.
Fordyce Bathhouse serves as a museum today, giving visitors insight into the therapeutic practices of the early 20th century, where people came for healing treatments involving the natural hot springs.
What makes Hot Springs National Park particularly unique is its free entry, allowing anyone to discover this historic site without the barriers of entrance fees or reservations.
Read at Business Insider
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