Secret North Korean passage discovered below the world's most dangerous border.

Celebrating the history of Hangul, the Korean writing system invented by King Sejong to improve his realm’s literacy.

The supreme shrine of the state.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

A symbol of hope, survival, and national character, especially after it rose phoenix like from the flames.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

The world's largest reflecting pool is just two centimeters deep.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Buy raw milk from a 24/7 vending machine or pick up tomb candles at this local market.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

Strange rumors surround the artist who created these solemn metal guard dogs.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

A public work of art that also provides some relief from the summer heat.

A whimsical bridge adorned with decorative dragons.

The narrowest street in Paris.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This historic railway museum may have lost its passengers but not its love for trains.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A former copper mine which became a truly unsuccessful prison.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.