An enormous, inside-out glass globe built in 1935.

A local legend says the theft of a holy relic explains the hand-shaped bloodstain on the facade of this cathedral.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.

A hidden bas-relief of a hare on a church main portal that brings good luck to the ones who find it.

A medieval tower with a suspended iron cage used as an open-air jail for criminals who were exposed as a warning.

The oldest church in Mantua was buried for centuries under the facades of other structures.

Sofia's legislative center is continuously reinventing itself.

Locals pay their respects at a shrine to soccer player Diego Maradona—which claims to contain a real lock of his hair.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

Water and windows define this defensive Italian well.

During World War II, this rice mill became a Nazi concentration camp.

A unique hotel for the artistic soul.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

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

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

A church of bones, decorated with 40,000 human skeletons.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

Dedicated to the works of the legendary special effects artist.