is the tallest building that has ever been built. The world’s tallest skyscraper, located in the United Arab Emirates, is 828 metres tall. Construction started in 2004 and, even though the interior is unfinished, the building officially opened in January 2009. According to the constructors, a South Korean firm, the skyscraper cost about $1.5 billion.

Shortly after the opening ceremonies the tower was renamed Burj Khalifa, after the president of the United Arab Emirates, who gave Dubai about $10 billion to pay its debts. Up to the completion of Burj Dubai the Taipeh 101 in Taiwan was the world’s tallest building. It reaches over 500 metres into the sky.

The new tower is Y- shaped and has 160 floors. Built with concrete and embedded steel plates the base gets smaller as the building gets taller. The top of the tower can sway 1.5 metres. Temperatures are about 7°C lower than at the base.

The new skyscraper will have over a thousand luxury apartments, 50 floors of offices and a luxurious Armani hotel. About 30,000 people will be working and living in the skyscraper once the interior is finished. The world’s highest observation deck is located in the 124 th floor. 54 elevators will get you to the top at speeds of up to 60 km an hour in about two minutes.