There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

These warring psychedelic crags commemorate an unsuccessful military operation.

Bridge that died in war and was resurected.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

This heart-shaped island looks substantially less lovely after a recent bulldozing project.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

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

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

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

Yugoslavia's biggest underground airport lies in ruins.

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

An ethereal glowing blue ocean cave in Croatia.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

This abandoned, partly demolished building is now home to beautiful graffiti and murals.

This plaque tells the story of an event that took place in an imagined parallel universe.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

A "simple-hearted artist" turned an isolated Icelandic valley into his own art museum.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

Largest private bird collection in Iceland, formed from a tragic accident.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.