The tallest tower in the world is seen during the opening of "At.Mosphere" the world's highest restaurant in the Burj Khalifa in Dubai Jan 23, 2011. Dubai's boom may have fizzled, but you can still live the high life perched atop the world's tallest building as the glitzy Gulf emirate unveils one of the world's highest restaurants. At.mosphere, on the 122nd floor, is one private elevator ride up the glass and chrome Burj Khalifa. [China Daily/Agencies]