The underground mall's skylights look like they could be part of a spaceship.

The former home of surrealist Edward James, who gave Xilitla its main attraction.

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

This Art Nouveau mansion was used as the "House of the Screaming Child" in Dario Argento’s giallo classic.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

The mysterious “eyes of the Devil” dot a street in the occult center of Italy.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

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

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

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

A beautiful deserted greenhouse in the middle of a park.

This large round boulder is said to emit spiritual power, but it may just be magnets.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

Roman-style pizza al taglio arrives here with magnificent, crackly crust.

Since 1999, this gelateria founded by a string instrument maker has been turning out some of Rome’s best scoops.

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

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

A Milanese café entirely designed by the American director Wes Anderson.