Dubai has some of the best visually-mind blowing architecture in the world. So the Burj Al Arab Hotel is just another building in that country. But this thing is blowing us away. Originally constructed in 2005 to promote the Dubai Open, the tennis court above the famous hotel began to host  tennis matches between some of the game's greats, including a match between Andre Agassi and Roger Fed­erer, 650 feet up in the air. [Design You Trust]