Burj Khalifa is known as the world's tallest building, where work started in 2004, and which was officially opened in 2010. It dwarfs the next tallest structure, the Tokyo Sky Tree in Japan, which is a measly 634-metres.
Burj Khalifa consists of the luxurious Armani Hotel, high-class residential apartments (residences), four magnificent pools, high-tech office space, an exclusive residents' lounge and an elite cigar club, not to mention state-of-the-art fitness amenities for its residents and an observatory.
