This is certainly one way to burn off some of the chocolate you began gorging on as soon as you got to Switzerland. Sure, most of the calories will likely burn from complete and utter fear, but a workout's a workout. Beginning in November, those interested in taking an extreme trek through the Swiss Alps can do so on the Peak Walk, a 10,000 feet high walkway that features a partially glass floor and a long look at your life. To say that it's an intense trek would be like calling the Swiss Alps a series of hills. Take a...