Standing at a whopping 829 metres high, the Burj Khalifa took the title of the world’s tallest building when it was completed in 2010. It has a total of 163 floors made up of hotel, residential and office space. While spending a night in the hotel may well be out of reach for most of us, you can still visit the building. It’s a popular attraction for tourists so it can get busy, but if you’re prepared to queue then the lift will whizz you up to the 124th floor where you can enjoy some breathtaking views from the observation deck.