More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

100 year tradition of fist fights, marked by marble footsteps.

The bomb-ravaged remains of of a colossal Neptune.

Five candy-colored villages on the Italian Riviera.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

A Nesting Doll of Churches.

Pilgrimage site for star-crossed lovers.

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

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

2300-year-old Roman road connecting the empire.

The yawning maw of this pagan visage is said to bite off the hands of liars.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

This community on a small Venetian island has taken to painting their houses in bright neon hues.