The Burj Khalifa, also known as the Burj Dubai, is a skyscraper located in Dubai, United Arab Emirates. It is the tallest building in the world, standing at 828 meters (2,722 feet) tall. The building was designed by the architecture firm Skidmore, Owings & Merrill, and was developed by Emaar Properties. The construction of the building began in 2004 and was completed in 2010. The building features residential, office, and hotel space, as well as observation decks and a variety of other amenities. The secret to its construction includes its unique design, advanced engineering and use of state-of-the-art materials, and the significant effort and resources that went into its development.