Do these monsters look familiar? The gargoyles on this church are all from pop culture.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

This crack in France's seaside cliffs once hid a sinister secret.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

An impressive if morbid collection of mummified remains from different eras of the region's history.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Enter the cabin of a life-sized Hindenburg replica.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A surreal museum of extraordinary industrial objects.

An eerie, derelict amusement park in Berlin.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

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