The tangled roots of a giant banyan tree have fully reclaimed the ruins of this abandoned warehouse.

The shape of this old salt factory complex was inspired by the course of the Sun.

The world's largest boar is a huge steel titan found at a French rest stop.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

The sunken structure looks like the victim of a catastrophic flood.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

Historic medieval fortified city in southwest France.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

France's most famous cemetery, with some of its most curious tombs.

A small statue commemorates a centuries-old event that still hangs over the people of Leuven.

A replica of a 17th-century map of the stars stands in the courtyard of a Belgian university.

Banished from town, this local jester concocted a clever return.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

No shoes allowed on this trail, which is designed to be experienced barefoot.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

What was once a bustling mining installation is now a bustling hub of contemporary art.