2,300 Year Old Solar Observatory in Peru

Sun Setting

The BBC is reporting on a site in Peru known as the Thirteen Towers. The thirteen notches line up with where the sun sets throughout the year.

http://news.bbc.co.uk/2/hi/science/nature/6408231.stm

thirteen towers

Share on Facebook Share on Twitter

More from History

What is the long now?

The Long Now Foundation is a nonprofit established in 01996 to foster long-term thinking. Our work encourages imagination at the timescale of civilization — the next and last 10,000 years — a timespan we call the long now.

Learn more

Join our newsletter for the latest in long-term thinking

Long Now's website is changing...