This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

This enchanting hill is home to fairy lore and a sinister local mystery.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

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

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

An ancient ossuary in Rouen.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

This Tang Dynasty behemoth is the biggest Buddha in the world.

A fifth-century temple improbably built into the side of a cliff.

Explore this massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

Enormous burial mounds of ancient emperors.

The most famous location in China was home to whole dynasties worth of imperial rulers.

The once highest point in China blends symbolic design with a kick of adrenaline.

One of the largest mechanical models of the solar system in the world.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

One of the oldest amusement rides in existence was a huge disappointment to its creator.