This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

One man's stunning attempt at eco-friendly living.

Small French town or alien garage?

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

A huge Megalithic chamber tomb located behind a cafe.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

If they push on just the right spot, even the weakest person can move this titanic boulder.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

France's Lilliputian park displays over 100 of the country's monuments for visitor perusal.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

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

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

An icy lake tucked among jaw-dropping alpine panoramas.

Avant garde house of Pierre Cardin on the Cote d’Azur.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

One of the greatest maze designer’s greatest mazes.

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

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.