A 12th-century fortress containing some of Berlin's oldest buildings.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This anatomical sculpture raises awareness about violence against women and promotes gender equality.

Grottoes, sculptures, and recycled ceramics permeate what was once just a small farm in France.

This former limestone quarry is now a subterranean wonderland of grand stonework.

This small red school was where Germany signed their surrender during WWII.

Folklore and history carved into Brittany's coast.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

Science fiction's grandfather has a fittingly marvelous tomb.

The curious underground history of keeping Paris clean.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A surrealist timepiece by the artist of melting clocks.

France's national museum of scientific and industrial instruments.

A museum of carnival attractions where you are invited to ride the rides.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.