Vroom across the earth's gold- and diamond-filled acne with today’s off-road Groupon: $55 for a four-hour H1 Hummer tour through two Arizona mountain ranges and desert with Stellar Adventures (a $135 value). Stellar Adventures’ exciting and information-packed Four Peaks Trail Hummer expedition takes intrepid explorers on a picturesque trail through Tonto National Forest, known, like the surface of Mars or a new pair of socks, for its rugged beauty.