Welcome to Castle Hot Springs, Arizona’s hidden oasis. Arrive at the hottest non-volcanic natural spring in the world after traversing 7 miles of unpaved roads. As a guest, you can soak in the thermal pools ♨️ dine on organic farm to table produce🥬 and — since Castle Hot Springs is a refuge from light pollution — soak up views of a gloriously dark night sky🌌. #arizona #az #hotspring #hotspringsarizona #arizonahotsprings #castlehotsprings #luxuryresort