An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The oldest stone house in Paris was built by its most famous alchemist.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

French commune at the heart of conspiracies.

The famous winding walk at Chartres is surrounded in mystery and myth.

A huge Megalithic chamber tomb located behind a cafe.

2300-year-old Roman road connecting the empire.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

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

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