A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

Glowing orb in Minsk houses 8,600,000 items.

Mausoleum and Holy Seat of Antiochus I of Commagene.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

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

A forgotten monument to Yugoslavian freedom.

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

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

An ethereal glowing blue ocean cave in Croatia.

This picturesque medieval monastery guards a small trove of historic treasures.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

A tribute to a man who defied the Nazis until his last breath.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

A Serbian church lit by chandeliers made of weapons.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

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

This famous archeological mystery may be an ancient example of movable type.