Located outside Medellín, this Colombian park focuses on conservation and sustainability.

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

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

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

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

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Looming communist pillar with a Czech twist.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This cheese shop also houses a museum devoted to Dutch dairy.

The former headquarters of history's oldest megacorporation.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

This saucy statue once caused outrage among locals.

Five candy-colored villages on the Italian Riviera.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

A marvel of Byzantine engineering under the streets of Istanbul.

The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This famous archeological mystery may be an ancient example of movable type.