This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Christ's blood preserved in a Belgian town.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A fantastical bed and breakfast with magically unique rooms.

An industrial relic is now one of Europe's most staggering art spaces.

No need to strap in for a "ride" on this walkable roller coaster.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

Lavish royal estate punctuated with heated greenhouses.

Climb inside an iron crystal magnified 165 billion times its normal size.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

One of the few surviving gates into Old Goa, the former capital of Portuguese India.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

Various sculptures are a rotating exhibit in this small town.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Two monstrous faces loom over a village in Czechia.

This former quarry is now a picturesque gorge that hides a sunken lake.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Admire dozens of life-size animals made from old scrap metal, nuts, screws, and valves.

According to the local legend, these boys and ducks were turned to stone by an angered water goblin.

A sculpture of the beloved author surrounded by characters from his fairy tales.

A church of bones, decorated with 40,000 human skeletons.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.