A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

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

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

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A bus with a butt and biceps to put Olympic athletes to shame.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Germany has its very own Centralia, whose spark remains attributed to "spontaneous combustion."