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Burj Khalifa-Beautiful Lightening on Worlds Tallest Building. It is the tallest structure in the world, standing at 829.8 m (2,722 ft). Construction of the Burj Khalifa began in 2004, with the exterior completed 5 years later in 2009. The primary structure is reinforced concrete. The building was opened in 2010 as part of a new development called Downtown Dubai. For more Videos Like and Subscribe to my channel https://www.youtube.com/channel/UCRnSzj8h8_BRVNcuVtDjXlg