"The prettiest love letters in the world" ... or so said Lord Byron.

Water and windows define this defensive Italian well.

Does this strange mural depict witches battling beneath a penis tree?

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

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

The oldest operating pharmacy in the world features 800-year-old recipes.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Da Vinci's equestrian statue, 500 years in the making.

A sunken idol welcomes parishioners to Davy Jones' Locker.

The mark of the Devil's horns on a marble column in Milan.

A fake medieval village in the middle of Turin.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Pilgrimage site for star-crossed lovers.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

Thousands of well-dressed mummies below a monastery.

Every inch of this chapel is covered in craftsmanship from across the world.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

The underground sanctuary of a mysterious ancient cult.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

Rome's semi-secret peephole vista is also a former Crusader stronghold.