Sampa Sky is a new sky deck in Sao Paulo's tallest building, the Mirante do Vale, where visitors can get their adrenaline pumping by stepping into a transparent box on the 42nd level. With a view that will make your stomach drop (in a good way), people can lie down, sit, and even walk to the edge of the glass floor for some epic photos. It officially opens on Sunday, but some lucky folks got a sneak peek and couldn't resist sharing their vertigo-inducing experience.