Tower of London · Tower Hill
The ravens must never leave — or the kingdom will fall
By royal decree, at least six ravens must be kept at the Tower of London at all times. If they leave, the legend holds, the Crown and the Tower will crumble. The ravens have their wings clipped to prevent flight. Each one has a name, a rank, and a military handler called the Ravenmaster. During World War II, the raven population was nearly wiped out by bombing — Winston Churchill personally ordered their numbers replenished.