Ancient Observatory Tour

Tour Ancient Observatories Worldwide - 1/13/09

From: http://www.newscientist.com/gallery/dn16422-best-ancient-observatories

Amazing observatories of the ancient world
To help celebrate the International Year of Astronomy, take an armchair tour of the most intriguing ancient observatories, guided by three leading archaeoastronomy experts: John Carlson of the University of Maryland, Ed Krupp of Griffith Observatory, and David Dearborn of Lawrence Livermore National Laboratory. The tour proceeds backwards in time, beginning with sites that were built most recently.

You can also read archaeoastronomer Clive Ruggles' plea for these sites to be preserved and protected: Save our astronomical heritage.
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The Torreón, Machu Picchu, Peru: Perched on a ridge between lofty mountain peaks, Machu Picchu is a stunning Incan city built around 1460, but abandoned a century later during the Spanish conquest.

One building with a curved stone wall is dubbed the Torreón, or "tower". Continued. . .

(Image: D S P Dearborn)

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Amazing observatories of the ancient world