This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

England's most famous front door has an accidental doppelganger.

This 135-year-old weather station studied the effects of the climate on human health.

The commemorative stone column conceals a secret laboratory.

The shallow, salty inlet was a safe haven for 19th-century pirates.

This Ukraine alleyway has become its own little island of forgotten things.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

A lush indoor jungle fills this bustling Madrid transportation hub.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The massive machine creates cracking displays of indoor lightning.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.