A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

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

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

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

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

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

A Serbian church lit by chandeliers made of weapons.

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

A pair of connected skyscrapers form this symbolic gateway.

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

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

The final resting place of the "father of special effects."

This poignant art installation raises awareness of violence against women.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.