Chichén Itzá, Mexico — At the spring and fall equinoxes, the setting sun casts serpent-like shadows along the northern stairs of El Castillo, or “the castle.” Built more than a thousand years ago by ...

During Egypt’s pyramid age, a well-connected man named Wahtye died and was laid to rest in the vast royal cemetery that now occupies the desert west of modern Cairo. His colorfully decorated tomb, ...