A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This automated sculpture of two men peeing will spell out text messages with their micturition.

A technicolor place of worship for Elevationists.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

Beneath an ancient wishing tree lies an underground chapel with 12th-century frescoes and catacombs dedicated to a lady saint.

Legend holds that St. Paul was flogged for preaching Christianity at this pillar.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

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

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

"Holy Wisdom" overlooks the city that became its namesake.

This historic black and white monastery is one of Bulgaria's architectural jewels.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This once-derelict building is now one of the most beautiful bookstores in the world.