"Eiger" translates to "ogre" in German, which seems a fitting moniker for the 13,000-foot beast of limestone, gneiss, shale, and ice that towers over the resort town of Grindelwald in the Swiss Alps. Its unpredictable weather, loose rock, and steep slopes have claimed the lives of more than 60 climbers, and yet its iconic 5,905-foot north face still proves irresistible. Now a new set of adventurers, wingsuit fliers, are not only climbing it but launching off it. Dean Potter (pictured) clinched the most heralded descent in 2009: After free soloing up the north face, he stepped into thin air for a four-mile, 9,000-vertical-foot flight that took two minutes and 50 seconds. The extreme sport is unquestionably one of the most dangerous on Earth, but perhaps that’s the allure: It’s the closest humans can get to true unadulterated flight.