Burj Khalifa
As of 2022, Burj Khalifa is the tallest building in the world. It has a height of 2,722 feet (829.8 m). Architect Adrian Smith designed the skyscraper. Skidmore, Owings & Merrill, the firm he works for, also designed the Sears Tower in Chicago, so they know a thing or two about big buildings. Construction began in 2004 and wrapped in 2009. One decision behind the skyscraper was for the city to create a larger tourism economy.