The Sydney Harbour Bridge Climb celebrates its fifth anniversary this month -- and I can say from experience, it is an amazing adventure that deserves to be replicated around the globe. Despite the somewhat ill-fitting raingear I wrestled with, every aspect of the climb is smoothly planned and totally safe -- you actually can forget that you're up on the side of a bridge girder because it's so wide and massive. And in any case, you're firmly latched on to a safety line, so you can gaze out over Sydney Harbour all you want. Highly recommended -- and I'm available to go again if anyone's handing out trips to Australia...