The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A dead saint, a deadly poison, and a mysterious holy ooze.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The walls and streets of the ancient city are peppered with penises.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Pompeii's less famous neighbor is still revealing her secrets.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Go inside to really appreciate this 500-year-old technological masterpiece.