A passage grave used in neolithic rituals.

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

An abandoned beach resort in Normandy reclaimed by artists.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

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

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

Two small chapels housed inside an ancient tree.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

An art-filled botanical garden and former dyeworks hiding in plain sight.

This mountaintop mariner’s church is packed with model ships and nautical art while hosting an annual maritime festivity for the townsfolk below.

Personal garden filled with mosaics made of recycled garbage.

This was the second largest mercury mine in the world and one of the oldest preserved mine complexes in Europe.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

This massive subterranean fissure is known as the "underground Grand Canyon."

The "dragon babies" of southeastern Europe.

A tiny basalt mountain with an observation tower overlooking the beautiful Bavarian countryside.

The largest brick bridge in the world.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

These 18th century gardens tell a rocky story of the son of Odysseus.

Most often copied TV Tower in the world.

Oberweissbacher Bergbahn - a broad-gauged cable car capable transfering railcars.

For centuries, Germans have been dancing in trees.