In the Mound Hill Cemetery resides the final resting place of the world's tallest couple.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

The only presidential monument to display a late POTUS's actual casket.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

Faces carved into the cliffs create an otherworldly walking trail.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This smily stone feline is meant to represent a mythical lion that almost destroyed the island of Kea.

The largest ancient burial mound in Ohio.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The largest earthwork effigy in the world.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.