This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Scandinavian island is the site of the first modern observatory.

This ghost town in Belgium will lose its street art when it ceases to exist.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

When German-Iraqi relations broke down, this embassy was vacated post haste.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

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

What was once an underground Nazi city is now Europe's largest bat reserve.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

A Roman monument to their own civil engineering prowess.

This Romanian village may have been drowned, but it is long from forgotten.

Gigantic Romanian salt mines used to heal respiratory conditions.

A Romanian church built from one single oak.

A giant portrait of an ancient king looms over the river.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

Rare and wonderfully wormy cadaver art captured in brass for centuries.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.