A piece of the front end of a British cruiser that was used as a block ship in World War I.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

Cozy basement bar sports an inventory of over 2,000 beers.

A museum of carnival attractions where you are invited to ride the rides.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The oldest stone house in Paris was built by its most famous alchemist.

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

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.

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

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

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Dynamite factory turned museum explores the history of explosives.

A fake medieval village in the middle of Turin.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

A landmark in the history of technology and computing is hidden in a tiny Baroque chapel.

The astonishing collection of an infamous criminologist.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

"The prettiest love letters in the world" ... or so said Lord Byron.