Stephen Wiltshire
I don't know how many have you seen or read anything about Stephen Wiltshire. He is an autistic man from England who has the ability to observe things and then draw them in intricate detail from memory. The act of remembering the details is, in and of itself, pretty astonishing. But I also think his drawings are quite beautiful. Here are a couple of videos -- one of him drawing Rome and the next of him drawing Tokyo.
