Burj khalifa....

The Burj Khalifa known as the Burj Dubai before its inauguration, is a megatall skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 ft)

Burj Khalifa or "Khalifa Tower" (Arabic: برج خليفة) is a very tall skyscraper in Dubai, United Arab Emirates and is the world's tallest building ever built, at 828m (2,717ft).
Construction of the Burj Khalifa began in 2004, with the exterior completed five years later in 2009.
The building was originally named Burj Dubai but was renamed in honour of the ruler of Abu Dhabi and president of the United Arab Emirates, Khalifa bin Zayed Al Nahyan.
Critical reception to Burj Khalifa has been generally positive, and the building has received many awards.view outside is

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