A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

There must be a pun in this haystack somewhere...

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The first pet cemetery in the United States.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Floating swimming pool within a moored vessel.

Step inside Lucy, the world's largest "elephant."

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

The heads of two giant mythological water horses honor Scotland's horselord past.