Southern Idaho’s Twin Falls attracts risk-takers and thrill-seekers written by James Sinks | photography by Visit Idaho Adrenaline comes from two primary places: your adrenal glands and Twin Falls, Idaho. Built at the edge of a 500-foot-deep canyon carved by the Snake River, the community of some 55,000 people is a scenic stepping-off point—and for daredevils, a jumping-off spot—for a plethora of pulse-quickening and sense-satisfying adventures. The most renowned of local risk-takers was legendary stuntman and frequent bonebreaker Evel Knievel, who gained worldwide attention just over a half century ago when he planned to soar across the canyon on a rocket motorcycle. In September 1974, with a rowdy crowd watching and television cameras rolling, the stuntman—wearing his signature white leather jumpsuit—hit the throttle in his steam-powered “X-2 Skycycle” and flew up a ramp. But the attempt fizzled when his parachute prematurely ejected on takeoff. The rocket spun downward into the…