A marble Lucifer hides behind the pulpit of this Gothic cathedral.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

The prototype for all Nazi concentration camps.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

The "Little Ones," show Portugal in full miniature splendor.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

This crumbling Portuguese ruin overlooks the populace it once ruled.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

Elaborate tile work in this railway station tells the story of Portugal.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Picturesque intersection of witchcraft and ancient Christianity.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

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

This medieval city gate is now a blend of the past and the modern world.

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

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

Constructed during the 1960s, this bridge is still the highest in Italy.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

Ancient snack bar of the Roman Empire re-opened.

A beautiful but toxic fountain of mercury.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.