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

This Manchester laundromat is hiding something.

These engineering masterpieces are a dominant feature of the Belfast skyline.

This massive monument has been telling the time for 150 years—at a slight angle.

One of the largest lenses of its kind ever created, this former ship beacon has been brought down to Earth.

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

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

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A museum marks and documents the site of the Titanic's launch.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Britain's only herd of free-ranging reindeer.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

A peculiar samurai statue overlooks the center of Brno.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

The sanctuary seems to either float atop the water or sink into the dirt, depending on the water level.

The longest and steepest staircase locks in the United Kingdom.

This iconic building was founded as a school for the impoverished, but became one for the sons of the local gentry.

The house in the middle of the motorway.

This astronomical clock is the second oldest in England.

Constructed from recycled wrought iron railroad tracks, it's been described as the most beautiful seaside pier in England.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

This network of narrow, medieval passages has the most delightful name.

Follow the original medieval paths that wind through this intriguing section of the city.