Beneath the city of Lourdes, France is a massive, concrete church.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

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

Walk through living pictures and music in the Cathedral of Images.

Fighting the British and making game shows for over 150 years.

An ancient ossuary in Rouen.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

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

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

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

A self-built mosaic house and sculpture park.

Sleep in a climate-controlled plastic bubble for the night.

An aluminum skeleton brings Chinese mythology to the French shore.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

Historic medieval fortified city in southwest France.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

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

The world's largest reflecting pool is just two centimeters deep.