Windblown rock formations in an ancient Roman quarry.

Stalactites and stalagmites in a beautifully lit cave.

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

This mysterious Sardinian festival sees a horde of blank-faced equestrians compete for tin stars.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A sculpture serving as an homage to Pope John Paul II.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Mysterious tombstones thought to be remnants of Atlantis.