we know them as 'round towers'and as to what that was used for I have no idea. But there are ancient navagation markings all over the place.
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TBL I posted this on,
Thu 12 Jul 2007, 15:41,
archived)
Probably some sort of Watch towerBut that wasn't an option
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Laird Dave Draws Now charges to take off his clothes.,
Thu 12 Jul 2007, 15:43,
archived)