This video shows a guy who supposedly have a photographic memory. He was flown across the city of Rome in a helicopter for 45 minutes and he was challenged to draw the entire city's aerial view within the following three days. He managed to draw out every single street, building (including the number of doors and windows); even though there were a few minor mistakes, his drawing was still fairly accurate.
It seems that he really does have a photographic memory, yet psychologists have evidence which suggest that it's impossible for a human to remember every single detail of an image. a psychology professor at St. Lawrence University says that some people may have phenomenal memories, yet their reports were never 100% accurate. He also states that children are more likely to have this ability, yet they lose it as they grow older.