A secret door leads to this cozy dive that sells only “milk.”

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The strange behavior of a tween led to allegations of witchcraft and a curse being placed on anybody within earshot.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

A library where thousands of books explain how to avoid another Great Recession.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

A curious collection of mechanical moving figures.

Britain's only herd of free-ranging reindeer.

A sweet symbol marks the place where torturous executions were once carried out.

A tongue-in-cheek arcade where the games are based on everyday life.

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

Lost subway station nestled beneath Toronto's busy commuter line.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.