A devastating landslide accidentally created this tourist hotspot.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

Yugoslavia's biggest underground airport lies in ruins.

Legend has it fairies gathered at the site of this medieval castle.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

This huge metal monument is slowly being stripped to its concrete skeleton.

An ethereal glowing blue ocean cave in Croatia.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

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

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

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

A forgotten monument to Yugoslavian freedom.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

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

Baroque celebration of the end of the Great Plague of Vienna.

A miniature train-ride through Slovenia's largest cave system.

A musical instrument played by the sea.

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

Op-art architecture designed for happiness.

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.