From the Beeb: Towers point to ancient Sun cult.

The oldest solar observatory in the Americas has been found, suggesting the existence of early, sophisticated Sun cults, scientists report.

It comprises of a group of 2,300-year-old structures, known as the Thirteen Towers, which are found in the Chankillo archaeological site, Peru.

The towers span the annual rising and setting arcs of the Sun, providing a solar calendar to mark special dates. [continue]