Which is the biggest tower in world?

The Burj Khalifa in Dubai, United Arab Emirates, is currently the world's tallest building. It stands at 829.8 meters (2,722 feet) tall and has 163 floors. The Burj Khalifa was completed in 2010 and is a mixed-use development comprising residential, commercial, and hospitality spaces, including a hotel, restaurants, and a luxurious observation deck called "At the Top."