Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Architectural monsters are devouring this palace's every door and window.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

One of the most important yet well-hidden museums dedicated to the history of medicine.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

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

On Japan's Tashirojima Island, cats are king.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.