Pilgrimage site for star-crossed lovers.

This ancient market is often referred to as the oldest shopping mall in the world.

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

An Italian hillside ghost town.

Five candy-colored villages on the Italian Riviera.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

Geothermal waterfalls in Tuscany.

Jesus' footprints and the first catacombs in the world.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The hallucinogenic center of the ancient world.

This watchtower once presided over the Berlin Wall.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This tank participated in the liberation of Dijon from Nazi occupation.