A 2,000-year-old engineering wonder hides beneath an Italian town.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

The old church, buried by the 1784 Mount Vesuvius eruption, is a remarkably well-preserved place where people now pray for the souls of the dead.

This Italian pyramid is said to hold the mingled remains of the dead from both sides of the Battle of Novara.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

A rather vulgar example of the transition from Latin to the Italian vernacular.

An unsettling painting of three faceless sisters that is surrounded by history and legend.

Just saying the name of this town out loud is said to bring bad luck.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

An abandoned bell tower in the middle of nowhere is the last testimony of a forgotten medieval village.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This cliff-face port is considered a masterpiece of mining engineering.

These pools have been abandoned for over 20 years.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

A dead saint, a deadly poison, and a mysterious holy ooze.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.