A grotesque collection of wax limbs depicting the symptoms of venereal disease.

The ruined doorway is a portal to the building's turbulent and torturous past.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A sharp sculpture made of thousands of pieces of jagged glass.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

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

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Giant topiary dog once played a role in a terrorist bomb plot.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.