An ode to the friendship between four Pacific Rim countries.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An underwater restaurant, surrounded by a coral reef.

Abandoned railway line circling the city of Paris.

Recently restored menagerie of Victorian-era beasts.

A long-overdue monument to the forgotten British men drafted into the coal mines during World War II.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

Stroll through Welsh history in a village of reconstructed structures.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The castle still holds traces of the abandoned Roman fort it was built atop.

England’s ancient oak tree has such an impressive girth, people have been hosting parties within the hollow trunk for centuries.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

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

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

Salt is slowly eating away this abandoned saltworks town in the desert.

The mysterious round rocks of Schooner Gulch.