This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

A font of vintage porn on the silver screen.

The celebrated eyesore created by starry-eyed sweethearts.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

Claude Monet was baptized in this lavishly ornate Paris church.

An ancient ossuary in Rouen.

An odd museum dedicated to French fakes.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

The curious underground history of keeping Paris clean.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The oldest stone house in Paris was built by its most famous alchemist.

Tombstones buried in overgrown grass mark the deceased occupants of this abandoned graveyard.

Wars fought and wars won are remembered by these abandoned bunker ruins.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.