The world's only museum devoted to the wonders of fluorescence.

Russia's giant concrete QWERTY keyboard is likely the largest in the world.

This frozen-in-time summer home outside Moscow provides a look at Russian life in the 1950s.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

The past, present, and future of Russia's signature alcohol is remembered in the world's only museum dedicated to the starchy spirit.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Immortal combat in a Moscow museum.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Amsterdam's Red Light District leaves little to the imagination.

This basement museum explores the art and artistry of fascism.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

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

This collection of French root art looks like an indoor fairy wonderland.

The fantastic architectural models of a French traveler.

Avant garde house of Pierre Cardin on the Cote d’Azur.

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

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Indents in the pavement are all that remain from a grisly death machine in Paris.