The world’s tallest building.

Now open in Dubai: the Burj Khalifa tower, which stands at 2,717 feet (828 meters) tall, has more than 160 floors and boasts views up to 60 miles. Designed by Skidmore, Owings & Merrill in Chicago, a few of the tower’s many features include a mosque (floor 158), an Armani hotel and 54 elevators, which can reach speeds of 40mph. Read more at the New York Times and Wall Street Journal.