The Burj Khalifa is indisputably the tallest building in the world. It contains high-end homes, global companies, and of course, a swanky Armani Hotel. At 830 meters high, it's truly a testament to human ingenuity. Only the 124th, 125th, and 148th floor are open to the public. As you can imagine, the views from this shining beacon of progress in a desert by the ocean are pretty spectacular.