What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

The prototype for all Nazi concentration camps.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This "floating railway" is one of the world's oldest monorail systems.

A wunderkammer of mysterious objects and stories.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The fairy tale castle of the "fairy-tale king."

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Hot Doug's "Hot Dog" Stand.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Roman-era ships unearthed...

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Rome's ancient Etruscan rival, now a park full of ruins.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Did Inca children also slide down these smooth rocky slopes above Cusco?