Geometry and mystery come together in an epic show of octagonal masonry.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

This Roman amphitheatre was also the location of the first gladiator school.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

Romans built the world's tallest artificial waterfall in 271 BC.

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

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

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

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

Geothermal waterfalls in Tuscany.

Largest necropolis in the Mediterranean.

The ruins of this medieval tower are destined to crumble into the sea.

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

David Sedaris called it "The greatest shop in the world."

This beautiful 150-year-old synagogue survived Italy's fascist period and the Second World War.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Drink wine handed out through a window as part of an age-old tradition.