This residence straddles a border between Belgium and the Netherlands.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This enormous steel tube is the biggest speaking horn in the world.

One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

A total of 22 tiny bridges cross this canal of the Yvette River, forming a unique trail.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The man who introduced reinforced concrete to the world demonstrated its genius by using it to build his own house.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

An odd museum dedicated to French fakes.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This banal Parisian entranceway is not what it seems.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.