Zeev,
I remember coming back with a friend to my dorm room over the Harvard Bridge in Boston about twenty years ago. It was so cold that we both felt if we didn't start running we might not make it back without serious nose frostbite. It was no joke, either.
You've probably heard this story but some here probably haven't: Admiral Byrd, the Antarctic explorer, was asked where the coldest place was he had ever been. He responded, the Harvard Bridge over the Charles river.