Huge stone depressions which may have acted as an Incan agricultural experiment.

A market for witches is hidden within a train station.

This London plaque marks the spot where David Bowie's famous alien made his debut.

The television series' iconic giant foot was borrowed from this classical painting.

The final resting place to 300 Victorian-era pets hides inside the city park.

Hidden beneath the streets of London is a secret subway that only carried mail.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Bioluminescent firefly squid light up this Japanese fishing port.

A taste of the macabre Tokyo's ritzy shopping district.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.