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

The longest hedge maze in the world.

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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Ruins of a 10th century church tucked away deep in a botanical garden.

Pompeii's less famous neighbor is still revealing her secrets.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Living trees form the structure of an open-air palace.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

A beautifully well-preserved ancient Roman villa.

Roman-era ships unearthed...

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Ancient snack bar of the Roman Empire re-opened.

Virgil's many-mouthed gateway to the underworld.

This 16th-century monastery has been turned into a surrealist architecture compound.

A 16th-century horror show built in a lovely Italian garden.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

This woodland architectural installation acts as a camera obscura for the heavens.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

An aluminum skeleton brings Chinese mythology to the French shore.

The hallucinogenic center of the ancient world.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.