A small museum of antique transport that's a must-see for bicycle lovers.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

A bike train runs along a disused railway line through the tranquil French countryside.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

An icy lake tucked among jaw-dropping alpine panoramas.

A font of vintage porn on the silver screen.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

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

This massive library holds what was once the largest book collection in the world.

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

Notorious artist squat renovated into legal studios.

The vast, legendary catacombs hold secrets much stranger than stacked bones.