Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

A subterranean shelter remains intact under a busy Paris railway station.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

A field filled with carved medieval tombstones called stećak.

The final resting place for the remains of 143 Habsburg royalty.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A haunting collection of the vanished and disappearing natural world.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The water here is so clear you can see the mysteriously sunken ship from the surface.

The Devil’s own choice when he needs a drink in Brussels.

Lavish royal estate punctuated with heated greenhouses.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

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