On 4th Jan 2010,The world's tallest building was inaugurated in Dubai, UAE, and named Burj Khalifa in honor of the ruler of Abu Dhabi, despite having been commonly referred to as Burj Dubai since its inception in 2004 .

The height of this wonder is 828 meter. The height was kept as secret until the inauguration ceremony. The whole world was excited because of this suspense. The height was disclosed in arithmetic progression, with the numbers being flashed onto the screen, one after another. The tower's height breaks all existing world records for tall buildings.

was unveiled tonight to a crowd of thousands and the world in a crescendo of fireworks, lasers and fountain displays.

Burj Khalifa achieved the distinction of being the world's tallest structure – surpassing the KVLY-TV mast (628.8 metres; 2,063 ft) in North Dakota, USA – 1,325 days after excavation work started in January 2004.

The tower also beats the 31-year-old record of CN Tower, which at 553.33 metres (1,815.5 ft) had been the world’s tallest free-standing structure on land since 1976.

Burj Khalifa employs a record-breaking 330,000 cubic metres of concrete, 39,000 metric tonnes of steel rebar and 142,000 square metres of glass; and it took 22 million man hours to build.

Other world records for Burj Khalifa include the highest occupied floor in the world, at over 550 metres (1,800 ft); the highest outdoor observation deck in the world – At the Top on Level 124; and the tallest service elevator, which travels to a height of 504 metres (1,654 ft).

Burj Khalifa is the focal point of the 500-acre ‘mega-project’ by Emaar Properties, described as the new heart of Dubai !!!