France's national museum of scientific and industrial instruments.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Got apples?

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Ruins of a German Castle on top of a towering stone pillar.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Started as a kitchen garden, now the second largest botanical garden in the world.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Terrifying derelict military hospital once housed a recuperating Hitler.

Metro station with a claim to rock n' roll fame.

A surreal museum of extraordinary industrial objects.

Cold war icon and onetime "hole" in the iron curtain.

A collection of abandoned typographic signs from Berlin and beyond.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.