A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

Two bulls enter. One leaves a champion—but neither loses its life.

This unusual hostel provides a glimpse of life in a city under siege.

A field filled with carved medieval tombstones called stećak.

A wellspring of natural Viagra found in Bosnia.

The place where World War I began.

The remains of a sunken military ship wreck visible through clear water.

A musical instrument played by the sea.

This abandoned Croatian stronghold never saw a great deal of conflict but it is still a beloved relic nonetheless.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

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

A miniature train-ride through Slovenia's largest cave system.

Walk through a restaurant's refrigerator door to reach this hidden bar.

The university library shaped like a giant piece of Swiss cheese.

A Swiss magician's vault of oddities.

Museum featuring strange and enchanting toys of the past.

The world's longest and deepest train tunnel.

One of the world's largest collections of pharmaceutical artifacts.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.