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

A student driver's nightmare.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A plaque is all that remains of a lost Oxford transport hub.

These ancient ruins were the final resting place of King Henry II's mistress.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

A Neolithic burial site built 1,000 years before Stonehenge.

A celebration of capitalism in Midtown.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

A Manhattan office building is home to the world's largest chess board.

Read a book next to a Midtown waterfall.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Home to the most complete dodo remains known - one head, and one foot.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Hidden beneath the streets of London is a secret subway that only carried mail.

A unique tribute to the millions of animals who served and died for the British military.