These warring psychedelic crags commemorate an unsuccessful military operation.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

Yugoslavia's biggest underground airport lies in ruins.

A musical instrument played by the sea.

An ancient knight and a symbol of the city's freedom.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

Traditional architecture and ancient irrigation systems are on display in this gorgeous mountain village.

This spectacular mosque houses the second-largest chandelier in the world.

This beautifully restored fortification kept the city safe for centuries.

This elegant arc of a waterfall marks a religious turning point.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This fairytale-like structure is the last turf church ever constructed in Iceland.

This stunning concert hall has become a symbol of Iceland's national recovery.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The Renaissance-era courthouse is a relic from the fortified town's centuries of Venetian rule.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

A whimsical bridge adorned with decorative dragons.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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