The Burj Khalifa is the world's tallest building, located in Dubai, United Arab Emirates. It stands at 829.8 meters (2, 722 feet) tall and has 163 floors. The building was designed by Adrian Smith of Skidmore, Owings & Merrill and was completed in 2010. It is a mixed-use development, with residential, office, hotel, and entertainment spaces. The Burj Khalifa is an iconic symbol of modern architecture and engineering.