Why does the Tower of London have ravens? A guide told "Early Show" co-anchor Erica Hill the ravens are part of an old superstition that, if the ravens leave, the tower will fall down, and there will no longer be a king or queen.
The famous author and eventual Catholic saint Lord Chancellor Sir Thomas More - a close friend and confidante of King Henry VIII - was beheaded at the Tower of London in his cell for disagreeing with the egotistical king.
A guard takes part in the closing ceremony, known as The Ceremony of the Keys, at the Tower of London. The display - held every day for more than 700 years - is the longest-running military ceremony ever.