This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

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

Architectural monsters are devouring this palace's every door and window.

An eerie, derelict amusement park in Berlin.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

An infamous house made famous by director Takashi Shimizu.

A magical place that lets you play in and explore the world of Studio Ghibli.

This historical theme park celebrates all things noodle.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Peace Park and the Atomic Bomb Dome.

The self-mummified monks of Japan.