This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

A surreal museum of extraordinary industrial objects.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

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

George Martin's Caribbean recording studio now rots within the shadow of an active volcano.

More than 100 antique vending machines housed in a used tire shop sell everything from candy to sake and ramen.

Seaside ruins of a settlement that date back to the first century B.C.

This humble bench is considered the most beautiful in the world.

The oldest Roman lighthouse still in use.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

A historic Christian shrine nestled within a spectacular natural cave.

These ungulates have quite literally bounced back from the brink of extinction.

An out-of-place grove of sequoias thrives in northern Spain.

This magnificent brick dome was made with an unusual design method.

A small church ornamented with medieval erotic sculptures.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

Eccentric sculpture garden brings Basque mythology to life.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.