The ruins of a medieval monastery named after a type of tree.

This single room has survived the centuries with almost no deterioration.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

A medieval weapon rumored to have been used by the brilliant poet himself.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

An impressive bridge over a ravine also served as an aqueduct.

One of the oldest still-working clocks in the world sits on an ancient tower.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.