Dubai's landmark building is the Burj Khalifa, which at 829.8 meters is the tallest building in the world and the most famous of the city's points of interest. For most visitors, a trip 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 multimedia presentation on both Dubai and the building of the Burj Khalifa (completed in 2010) 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. Nighttime visits are particularly popular with photographers due to Dubai's famous city-lights panoramas. Buy your Burj Khalifa "At the Top" Entrance Ticket in advance to avoid long line-ups, especially if you are planning to visit on a weekend.