Dubai's landmark building is the Burj Khalifa, which at 829.8 m is the tallest building in the world. To the observation deck on the 124th floor here is a must-do while in the city. The views across the city skyline from this bird's-eye perspective are simply staggering. The slick observation deck experience includes a multi-media presentation on both Dubai and the building of the Burj Khalifa before a high-speed elevator whizzes you up to the observation deck for those 360-degree views out across the skyscrapers to the desert on one side and the ocean on the other. Night-time visits are particularly popular with photographers due to Dubai's famous city-lights panoramas