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

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

One of the most important yet well-hidden museums dedicated to the history of medicine.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Eighty million natural history specimens call this gargantuan museum home.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

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

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Home to three historic ships from the age of Vikings.

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

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Artist Danielle Jacqui decorates nearly every inch of her home inside and out with her work.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

A chapel on a volcanic core, marking the end of a successful journey.

A French library that makes sure its love of books is writ large... giant in fact.

Balconies that have a most unusual accent.