Striking occult iconography on a medieval German church.

The "Prussian Versailles" that is as glorious today as when it was built.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

A striking 12th-century-style castle built on the edge of a cliff.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Started as a kitchen garden, now the second largest botanical garden in the world.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

A collection of grotesques lines the walls of this Italian villa.

The California secessionist movement has its own foreign embassy, in Russia of all places.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

The wooden house where the jazz great learned to play the piano.

Ancient paintings known as the "Sistine Chapel of Cave Art."

"The most colorful grottoes of the world.

An intricate and amazing house built by architect Karl Junker.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This unique Renaissance castle was turned into a home for Nazi occultism.

World War II-era Nazi compound nestled in the Santa Monica hills.