As of 2019, the Burj Khalifa in Dubai, United Arab Emirates is both the tallest building in the world and the tallest man-made structure ever built. The structure was named in honor of Sheikh Khalifa, the president of the UAE. The burj—Arabic for 'tower'—is part of a complex in downtown Dubai that also includes the world's second-largest mall by area and one of the world's largest fountains. The building has three curved wings in a 'Y'-shape that act as buttresses supporting the building's massive height. That exact height, 2,722 feet, was kept a closely-guarded secret until the building opened.