This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A subterranean playground in an abandoned slate mine.

At high tide this strange footbridge appears to have no purpose whatsoever.

The largest greenhouse in the world is home to over one million types of plants.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

Famously misunderstood wonder of the ancient world

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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

Eighty million natural history specimens call this gargantuan museum home.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

Catacombs turned marketplace.

An unusual round church in London with a Templar past.

One part local history, 99 parts gruesome haunted house.

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

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

The museum houses one of the world's largest shoe collections, boasting over 12,000 pairs.

This early Norman castle was the first historical monument protected by an act of Parliament.