Giant designs traced out by earth mounds could be thousands of years old.
You have reached a premium content area of TOL. To read this entire article please login if you are already a TOL subscriber.
Not a subscriber?
Annual membership costs only $55 per year for individuals ($33 for students) and organizational subscriptions start at $134 per year.
Subscribe today for access to:
Full access to the website, including premium articles videos, country reports and searchable archives (containing over 22,000 articles).
You can subscribe here to gain access to the entire website.
Not a subscriber?
Annual membership costs only $55 per year for individuals ($33 for students) and organizational subscriptions start at $134 per year.
Subscribe today for access to:
Full access to the website, including premium articles videos, country reports and searchable archives (containing over 22,000 articles).
You can subscribe here to gain access to the entire website.