A unique underground structure dating back to the 1st century BC.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

700 iron sculptures crammed into a Mediterranean park.

A fortified palace in the shape of a ship on the Thiou river.

18th century underground pilgrimage site, dedicated to a Saint that did something...

Rows of multicolored bathing huts paint the sand dunes with pops of color.

A former milk-delivery driver and his wife turn their home into a glimmering mosaic.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

These colorful French islands spent a stint bootlegging booze during American Prohibition.

A total of 22 tiny bridges cross this canal of the Yvette River, forming a unique trail.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

One man's desire to transcend art led to the construction of this outsider chapel.

Artist's eccentric property excessively decorated with found objects and work of his own.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

An art world insider finds himself battling for his artistic home.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

This collection of French root art looks like an indoor fairy wonderland.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.