A curious cave church carved into the face of a cliff.

The first mosque in the world to receive electricity.

A field filled with carved medieval tombstones called stećak.

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

A forgotten and crumbling Yugoslav monument to the victims of fascism.

An abandoned brutalist monument whose history has been lost to the ages.

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

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

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

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.

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

This historic cemetery was inaccessible for several years due to dozens of land mines.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

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

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

These warring psychedelic crags commemorate an unsuccessful military operation.

This brutalist monument is inscribed with 9921 names of Yugoslav partisans who perished during WWII.

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 historic timepiece is thought to be the only public clock in the world that keeps lunar time.