The owners of the Sears Tower Chicago, the tallest skyscraper in the United States , installed four glass box viewing platforms. These balconies are suspended 1,353 feet (412 meters) in the air on the 103rd floor. They are 10ft high and 10ft wide and can hold 5 tons with their 1.5 inch thick glasses. You can get a really impressive view from the platform and it is definitively something to try out if you happen to visit Chicago…but it is definitely not for people who have vertigo….and I am one of these people! If I were to step on to the platform, I will 100% suffer from extreme giddiness and there is a very high chance that I would vomit.