looking for the best U.S. destination to relax solo?

I’m planning a solo trip and want to find the perfect spot in the U.S. to unwind. Ideally, somewhere warm with a peaceful vibe where I can treat myself—I'm flying business class with Amex points! I’m open to all suggestions, but I’m really craving somewhere that offers relaxation, maybe some outdoor beauty or a serene escape. Any recommendations for places that are great for solo travelers looking to recharge? Would love to hear your thoughts! #solotravel #traveladvice #relaxinggetaways