A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A Spanish-style estate that has traded black ties for rock concerts.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

The Andean town where every single building is decorated with a brightly colored frieze.

An ancient Viking village in North America that predates Columbus by 500 years.

This town near Nagasaki is flecked with fruit-flavored bus stops.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Art and a pun, all in one.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

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

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A surreal museum of extraordinary industrial objects.

An eerie, derelict amusement park in Berlin.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Cat art as far as the eye can see.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.