Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This mysterious and unique painting is filled with symbolism.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This macabre painting of a Shakespearean scene looks like something out of a nightmare.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The taxidermied remains of a once-great parrot.

Eighty million natural history specimens call this gargantuan museum home.

A naturally mummified 2,000-year-old man.

The television series' iconic giant foot was borrowed from this classical painting.

Scattered throughout London are ancient remnants of the city's former bounding wall.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Hear the quietest sound from across the dome.