A park where people have been going to feed friendly pigeons since the 18th century

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The only surviving prototype for Buckminster Fuller's house of the future.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The two writers famously didn't come to blows over the Oxford comma.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

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

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

Venice's island of the dead.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Two stone columns flank the grand Venice square, but there were supposed to be three.

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

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This statue is the only female representation of Rome's "talking statues."

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

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