The tallest building in the world opened in 2010. There was a glitzy firework display to celebrate the occasion.
The Burj Khalifa in Dubai, United Arab Emirates is nearly three times the height of the Eiffel Tower.
The statement building cemented the reputation of the city as a place for luxury tourism and high-end real estate.
Alex Collins speaks to chief architect Adrian Smith about his creative vision and the challenges he faced on such a huge project.
(Photo: Burj Khalifa. Credit: Getty Images)