These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

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

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

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.

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

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

A whimsical bridge adorned with decorative dragons.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A unique two-level bridge designed to honor a king.

The remains of the last Bosnian fortress to fall to the Ottomans are still standing.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A tiny chapel and burial site lurk underground in Jajce.

A 16th-century mosque rebuilt after wartime devastation.

A field filled with carved medieval tombstones called stećak.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

Some of the secrets of human origin are revealed at this museum.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.