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

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The underground sanctuary of a mysterious ancient cult.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

An alchemist's "magic door" stands in the middle of a Roman park.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A fairy tale castle in modern Rome.

Architectureal fantasy quarter of Rome.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

Walk through a fairytale in Tuscany.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

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

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

Brussels' favorite peeing boy has a sister.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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

BDSM, 1930s Style.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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.

Shattered columns and Egyptian pyramids outside of Paris.

A haunting collection of the vanished and disappearing natural world.