A carved grave marker from the 2nd century is mounted in the alcove wall of this Bavarian church.

A graveyard and memorial chapel for victims of leprosy.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

A striking public sculpture representing the period of martial law in Communist Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

Relive a Polish uprising via an enormous, century-old cyclorama.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

A famous big wave from Japan serves as a tribute to the victims of the disastrous Elbe flood.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

This mysterious and once-grand memorial still embodies a remarkable architectural vision.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Naturally formed rock city in Poland.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Enormous sandstone towers loom within a Czech forest.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

A plaque marks the former home of Käthe Paulus, an aerial acrobat who invented the modern folding parachute.