These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

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

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

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

The only castle in North America to ever house European sovereigns.

Diego Rivera's massive tiled fountain and failed infrastructure project.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Part bookstore, part café, and part forest.

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

Frida Kahlo's childhood home, now a museum of her life and works.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.