The headquarters in Salem doubles as an occult art gallery.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

This building has survived for more than a century and remains virtually untouched.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

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

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

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

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

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

The place where World War I began.

These warring psychedelic crags commemorate an unsuccessful military operation.

Bridge that died in war and was resurected.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.