A 19th-century British industrialist built this Louis XIII–inspired chateau for his homesick French wife.

The house in the middle of the motorway.

A unique sculpture park that features the works of several famed artists.

Perhaps the most spectacular grotto along the Algarve coastline.

This 15th century pub is one of only two pubs in England situated on consecrated ground.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

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

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Makers and sellers of the original and finest York Ghosts.

One of the shortest streets in York has an especially odd name.

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

An incredibly well-preserved piece of ninth-century Viking poop.

Architectural monsters are devouring this palace's every door and window.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A massive marble foot is tucked away in a small alley near the Pantheon.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A subterranean playground in an abandoned slate mine.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

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

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