Burj Khalifa is an architectural marvel. Its construction began in January 2004 and was opened on 4 January 2010. At over 828 metres (2,716.5 feet), Burj Khalifa holds multiple world records. Tallest building in the world Tallest free-standing structure in the world Highest number of stories in the world- 163 Highest occupied floor in the world- 163rd floor Highest outdoor observation deck in the...