A curious cave church carved into the face of a cliff.

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

This one-time health resort was used by aristocrats around the world.

A little sculpture with a large wardrobe.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

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

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

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

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.

Bridge that died in war and was resurected.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

These crumbling Latvian forts make for some haunting seaside ruins.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

3,000 market stands in five former Zeppelin hangars.

The mile-long pier stretches from a ruined fortress out into the Baltic.