Panorama, Chankillo Site and Astronomical Observatory (Peru)
Ivan Ghezzi (c) 2008
The archaeological site of Chankillo of Peru was first investigated by Julio C. Tello, but the astronomical observatory aspects of it were not identified until 2007, by a team led by Ivan Ghezzi of Yale University.
Detailed information about the astronomical observatory can be found on the Chankillo page here at About.com. .