Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

What happens when you cross a mayor and a painter?

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A museum dedicated to the former country.

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

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

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

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

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

Oriental bazaar in the heart of Sarajevo.

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

The place where World War I began.

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

Bridge that died in war and was resurected.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

An ancient knight and a symbol of the city's freedom.