A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

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

A house of bones — but nobody is quite sure to whom they belong.

A church of bones, decorated with 40,000 human skeletons.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A sweet symbol marks the place where torturous executions were once carried out.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Protecting the dead from opportunistic body snatchers.

The most loyal of little dogs, or a Victorian era publicity stunt?

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

Enter this small nook and you'll be surrounded by 360 degrees of street art.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

An homage to the medieval rulers of Bulgaria.