@33MHz@andrew I originally thought the Washington Monument was taller but, if I recall correctly, that is only 550 feet tall. Probably because an obelisk just looks taller than an arch.
@Andrew I was set to drive through Saint Louis almost 10 years ago and was very concerned that I would miss the arch so set my Garmin up to drive right to the arch. You could see it FOREVER, though. I had no need to worry. :-)