From the 1,465-foot-high Sky Pod or from the 1,136-foot high observation deck, reached by glass elevators, take in panoramic views of the city from the world’s tallest, freestanding structures — 1,815.5 inches high. A fun family challenge: See if you can stand on one of the glass panes on the floor below — a mere 1,122 feet high. Although strong enough to withstand 14 hippos, the glass creates the illusion of walking on nothing at all.