Semi-precious Blue John stones have been mined in this cavern system for centuries.

The world's oldest model village.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

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.

The sign at the garden gate reads: "These Plants Can Kill."

This giant wooden treehouse within a sprawling garden has its own eatery.

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

Explore Hull's historic Old Town by following the sea creatures scattered throughout its charmingly cobbled streets.

The phone booths in this English town have distinctly milky hues.

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

An incarceration museum on the spot of possibly the oldest prison in England.

A cluttered and astounding collection of antiquities and curiosities.

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

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

The cedar tree in Highgate Cemetery earned its title by accident.

Eighty million natural history specimens call this gargantuan museum home.

London's largest outsider art museum.

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

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

At just 51 feet and 10 inches long, it's the shortest street in England.