Tag Archives: Chankillo

The Ancient Solar Calendar at Chankillo

Chankillo, built 2,300 years ago, in northern Peru is an extraordinary observatory also used as a solar calendar.  Built on a ridge in the Casma Valley at Chankillo, a structure of 13 towers, the observatory allowed remarkably accurate astronomical observations by people with an exceptionally sophisticated understanding of astronomy and the rising and setting arcs of the sun.