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

The ritual has been performed uninterrupted for nearly 700 years.

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

An architectural oddity hides in plain sight on this iconic London bridge.

Public access to clean drinking water was an instant hit among the masses.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The taxidermied remains of a once-great parrot.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This striking statue brings a scene from the African savannah into central London.

An 18th-century viewpoint across the surrounding highlands.

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

This small museum in a 17th-century building honors three iconic Scottish writers.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

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

A rare and unique example of an 18th-century door latch calls this restaurant home.

The location of a citizen uprising that led to a gruesome act of mob justice.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This statue stands as a message against the ills of Apartheid.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.