London born architectural artist S Wiltshire, is also known as the "human camera" for his ability to draw entire cityscapes in depth after seeing it just once. He amazed everyone by drawing hundreds of London's buildings in exact scale, a 7 square-mile area, from memory after just a 20-minute flight by helicopter over the city. Check out the rest of his amazing work here: http://www.stephenwiltshire.co.uk/gallery.aspx