It was once nicknamed "the most bombed hotel in Europe."

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.

This mundane post marks the old location of the city's main postal hub.

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

These barriers stand as stark reminders of Northern Ireland's troubled past.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

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

One man spent 10 years building a spectacular section of road because no one else would.

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

One of Europe's oldest libraries.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

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

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

One part local history, 99 parts gruesome haunted house.

Northern Ireland's Brobdingnagian stepping stones.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Famously misunderstood wonder of the ancient world

Kings Cross Station pays tribute to its role in Britain's best-selling book series.