Tower of London, Raven. Eight ravens are kept at the Tower of London. Their wings are clipped so they can't fly away. Legend has it that failing to have Ravens reside at the Tower will cause it to crumble and a terrible disaster shall befall England.
"Raven's Dogfight" by ThorgnyrD here's what he says: "I was watching a flock of ravens that hovered over the new Cultural House in Akureyri. They had small fights over leftovers, icescreamboxes and some other stuff. I tried to catch some of their acrobatics in the air with my camera. Pretty difficult though aiming the lens straight up to grey sky. Got some rather strange pictures and among them this moment."