If you want to confront your fear of heights, consider visiting one of the new Sears Tower Balconies, which allow you to step out onto a Plexiglas floor and look straight down. Here's the full AP story. I know that this will not be for everyone. I once told a buddy about seeing how close I could stand to the edge of a cliff at the Grand Canyon until he tersely asked me to stop talking about it because he was getting nauseated. Actually, a few years ago, my wife and I visited the CN Tower in Toronto, and had the opportunity to stand on Plexiglas balcony to look straight down. Here's a photo I took: