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

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

This South London cemetery holds the remains of more than 15,000 people.

Pop culture has helped to keep this iconic British building from being destroyed.

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The most loyal of little dogs, or a Victorian era publicity stunt?

A sweet symbol marks the place where torturous executions were once carried out.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

360° views of the city plus five floors of optical illusions and hands-on science.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

The oldest inn in England served brew to the crusaders.

Huge winged monument in the United Kingdom.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.