Adventure is full speed ahead in Switzerland's Jungfrau region. Jeff sails over the Alps on specialized ziplines and soars 11,000 feet above sea level to the "Top of Europe" at the Junfraujoch. He wanders the medieval ramparts of a fairytale castle, gets a crash course in making his own organic chocolate, and discovers how a traditional alphorn is crafted. In crystal mountain waters, Jeff focuses on sports that leave a light environmental footprint, from thrilling white water rafting to soul-soothing kayaking.