I just happened across this:
http://wakinguponturtleisland.blogspot.com/2013/05/underwater-copper-culture-site.html
[PWAX here: hey everybody, go look at that link]
http://wakinguponturtleisland.blogspot.com/2013/05/underwater-copper-culture-site.html
[PWAX here: hey everybody, go look at that link]
I have a book titled "The Dragon in the Lake," about unusual stone constructions in Rock Lake in Wisconsin. The images posted by Tim of some unusual walls remind me of this.
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