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Two of the famous guards at the Tower of London, known as Yeoman Warders. The guards are more commonly known as "beefeaters."
The Yeoman Warders have a history of protecting the monarchy, but today, they protect the history of the storied Tower of London by educating millions of visitors.
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The Yeoman Warders live on-site at the Tower of London. They're seen here at the end of the day during the Ceremony of the Keys in which the Tower gates are locked tight.
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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.
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To make sure the ravens don't leave the Tower of London's grounds, the birds' wings are clipped. They're fed by the Yeoman Warders, who also live on the Tower's grounds.
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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.
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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.
