In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Eighty million natural history specimens call this gargantuan museum home.

Rebuilt remains of a temple to Roman god Mithras.

The designer of this railway tunnel added a birthday present for himself.

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

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

This abandoned airplane hanger is said to have once been a top secret launch facility.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

A war-torn Olympic relic is being overtaken by graffiti and nature.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

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

Bridge that died in war and was resurected.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

Longest fortress system anywhere in Europe.

Humble beginnings for one of the world's most famous scientists.

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

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

Hideout of thieves, monks, and goat-footed gods.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The hallucinogenic center of the ancient world.