Death Valley National Park boasts the highest air temperature ever recorded (134°) and routinely hits 120° in summer in the shade. Why would anyone go here? Well, it’s your closest chance of experiencing Mars on Earth. Cracked salt flats flanked by colorful striped hills and badlands. A valley that you both want to walk farther into and also run far away from. In December we thought the park would be empty. It was packed, parking lots teeming. But on our way out, we pulled off the perfectly paved road and watched dusk descend on the valley without another soul in sight.