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Old Comments:

2011-09-05 06:44:41
The photographer is George Steinmetz for National Geographic.
2011-09-05 06:20:31
You are very welcome, Connie. Hope it helped.... :)
2011-09-05 05:58:46
Thanks PG. That certainly makes sense...that French site mentioned 'forts'. I saw something similar to that along the Normandy coast, but it was more in the shape of a quarter moon.
2011-09-05 05:38:56
Connie, this explains what a redoubt is...... :)
2011-09-05 05:36:01
What's a defensive redoubt?
2011-09-05 05:24:02
French military ? Then probably some kind of defensive redoubt.
2011-09-05 05:11:24
A French website indicates it was built by the French military, but it does not say why.
2011-09-05 00:20:05
No, is not a well. No persons are knowing what this is for certainly.
2011-09-05 00:11:51
Oh, are you THE MISTER SPOK ? Nice to see you then. Could you find a few moments to wait here in our Galaxy ? I do think, once more we have around here an unpaid bill.
2011-09-04 23:55:51
nothing mysterious, it' s only an old dry well
2011-09-04 23:43:01
It's a sign for the Alien Mothership...
2011-09-04 23:29:53
I hope that many will feel prompted to respond and solve this mystery so that we can close this case. Thank you
2011-09-04 23:05:02
This is mysterious circle of stone, about 60 feet diameter, in Tenere desert, Niger. No one knows who built it or what for it was built or when.