A network of hundreds of interconnected wineries in caves hides under the town center.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Turntable anonymously received orphans, alms, and groceries.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

Metro station with a claim to rock n' roll fame.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Commonly acknowledged as the only public monument to the Devil himself.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A contemporary art installation housed within a Gothic cathedral.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

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

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

Morocco's Argania trees are infested with nut-hungry goats.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.