Thirteen Towers

This image released by Yale University, shows the sun rise between Tower 1 and Cerro Mucho Malo at the June solstice, 2003, viewed from the western solar observatory. The sunrise position at the solstice has shifted to the right approximately 0.3º since the year 300 BC. Archaeologist from Yale and the University of Leicester claim this is the earliest observatory in the Americas with alignments covering the entire year.
Ivan Ghezzi / AFP/Getty Images
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