This Luxembourg cave is covered in cryptic looking marks left by mining activity.

Learn about stars, weather patterns, or just enjoy the panoramic view of Ghent.

Paris' linguistic guide to the international language of, yes, love.

France's most famous cemetery, with some of its most curious tombs.

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

How did a French journalist’s grave become the sexiest statue in the cemetery?

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

The final resting place of the "father of special effects."

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

The last Oostende trawler to fish off Iceland is now a museum.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

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

A monument to the man who almost killed Hitler.

One of downtown Berlin's last reminders of its Communist past.

Berlin's old airport.

Floating swimming pool within a moored vessel.