A stately palace has been converted into the world's largest cannabis museum.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

A surreal museum of extraordinary industrial objects.

A slice of central Asia in the middle of Berlin.

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

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

An eerie, derelict amusement park in Berlin.

Crossing a suspension bridge above a forest is the only way to reach this 12th-century monastery.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

On the outskirts of the small village, an abandoned grassy field glitters thanks to the white stones of an ancient structure.

A massive cave once a secret military base is now home to thousands of bats.

A decaying, yet still functioning, work of communist architecture.

The social hall of this former factory is a Communist-era time capsule.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

This apartment is a true time capsule of local life in Bulgaria during the Soviet regime.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.