The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's "Island of the Mad."

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A vintage penny arcade hidden in the back of a fun fair-themed bar.

Stunning ruins of what was once the center of one of the greatest empires in East Africa.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

A museum within a museum, devoted to history's most questionable medical devices.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

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

A marvel of Byzantine engineering under the streets of Istanbul.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

An astounding collection of medical specimens, including bits of President Lincoln.

Narrowest house in Boston.