Just been having a stroll around Saudi Arabia Google Earth …….
Found this: Enlarge the image using the link ‘view larger map’ and zoom into the green arrow.
looks very interesting and seems to have only recently come to the attention of Aerial Archaeologists due Google Earth enhancing the resolution of the area.
I cannot as yet find much about them, other than they have been known about since the 1920 when Royal Airforce pilots mention unusual archaeological structures: I knew I should have got out more when I was there in the early 80′s.
If the above has got your interest, have a look at this link for: saudiaramcoworld desktop.archeology for more information that has just been sent for me to peruse.
South America does not have a monopoly on this stuff – fascinating.