Stephen Wiltshire: The Human Camera
Stephen Wiltshire is known as The "Human Camera" and has the amazing ability to commit almost everything he sees to memory. In a film called, "Beautiful Minds: A Voyage into the Brain", Wiltshire is flown over the city of Rome for 45 minutes and is asked to draw everything he remembers within 3 days. This video documents this process and is amazing to watch. As a computer junkie, I have lost any talent to remember, thus I find this fascinating.
Similarly Gilles Tréhin is a Savant who has been creating his own imaginary city since 1984 and has been drawing each building one by one.
Link (via Fazed)