A surreal museum of extraordinary industrial objects.

A fascinating insight into daily life in the Eastern Bloc.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Where once there was a train station bathroom, there is now this German burger joint.

A beer pipeline runs beneath Bruges.

Legend holds that this knife serves as a chilling reminder of the deadly rivalry between two local builder brothers.

An artificial hill and apparent calendric structure built in the Early Middle Ages immortalizes a legendary Polish princess.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

From open waters to open dance floors—this decommissioned ferry has been transformed into a lively nightclub.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

This sinister Baroque entryway could lead you to a terrible fate.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

When this funny little building went up in the 19th century, most people thought it would simply fall over.

A brutalist gem towering over the heart of Milan.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Third time's a charm, or in this case, two testicles are.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A Milanese café entirely designed by the American director Wes Anderson.