The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

Where layer cakes tower above one’s head and there is never a shortage of icing.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

Twelve natural mummies are displayed in the crypt of this former monastery school.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Water and windows define this defensive Italian well.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Da Vinci's equestrian statue, 500 years in the making.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.