The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Nearly every wall in this French villa has been "tattooed" by artist Jean Cocteau and other famous painters.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

The bears may be gone, but their old cages can still be found.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Museum dedicated to awful artwork.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

An enormous, inside-out glass globe built in 1935.

Dim sum, served in a grand old theater.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This collection of grinning ephemera has grown from basement to Brooklyn.

A staggering collection of photographs depicting medical, social, and historical change.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

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

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Unlock the secrets of the conjuring arts.