The Burj Khalifa in Dubai is the tallest building in the world at 828 meters tall. It was designed by architect Adrian Smith and took over 6 years to build at a cost of $1.5 billion. Some key facts are that it has 163 floors, 57 elevators that can travel 504 meters, and can accommodate 35,000 visitors at a time. Its Y-shaped floor plan maximizes views and its triple-lobed footprint is inspired by Islamic architecture.