Google Earth helps find El Dorado - Times Online

Geometric shapes dug into the earth were first noticed by a Finnish archeologist flying over the Amazon. The shapes are made up of a series of trenches topped by banks and connected by a network of straight roads. The geometric shapes are thought to be the remains of roads, bridges. moats and squares: the basis for a civilisation spanning 155 miles.

If you want to see one of the structures in Google Earth: S 08 50’ 38”, W 67 15’ 11”
or S 08 52’ 32”, W 67 14’ 42”
or S 8 43’ 13”, W 67 10’ 34”

These locations were published in "Pre-Columbian geometric earthworks in
the upper Purus: a complex society in
western Amazonia"

Google Earth helps find El Dorado - Times Online