My husband just spent a couple of weeks in Sydney on business. But he had time for a little fun - climbing the Sydney harbour bridge. He wasn't totally convinced about the value of the trip but now he says that it was worth every penny. His three hour or so climb was timed so that he saw the view by daylight and by dark. It isn't just for athletes - but there is a brief check to make sure that you can climb ladders. There has even been a hundred year old climber.

http://www.bridgeclimb.com/

Frances Toronto, Canada