One of Europe's oldest libraries.

This 11th century tower is said to be the oldest building in Oxford.

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

Hidden in plain sight, this creepy sculpture watches from above.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

This London plaque marks the spot where David Bowie's famous alien made his debut.

This knockout museum lies in a sleepy corner of London.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

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

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

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

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

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

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

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

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

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

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