This free, take-a-book shop seems like a trick but isn't.

The trials and tribulations of marking Poe's grave.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

Obelisks and stone pineapples in the Irish countryside.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

This archaeological site was the center of the extinct Yarmukian culture which developed the first roads and pottery in Israel.

Secret North Korean passage discovered below the world's most dangerous border.

Over 12,500 words are scrawled across each room of this historic plantation house and no one knows why.

Medicinal spa created with the discharge from a geothermal energy plant.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.