This ancient structure was built by a mysterious civilization that was largely destroyed by a volcanic eruption.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

A quirky and charming restaurant founded by artists.

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

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

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

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

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

A church dedicated to the Mexican skeleton saint.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

The world's largest bioluminescent area was undiscovered by science until 2005.

An isolated village literally built into the crevices and rock formations of a mountain.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Where beer lovers can literally immerse themselves in beer.