While hoping to find oil under improbable sand dunes in southeastern Arizona, geologists instead struck hot water with their exploratory drilling. Today, Hot Well Dunes Recreation Area has 2,000 acres of free-play sand dunes and two hot tubs replenished from the unlikely water discovery. Sitting far away from any sizable city, you may be the only one enjoying the sand and water on a weekday. The remoteness also means a very dark sky for star gazing at the end of a day playing in the sand.