I was out yesterday with camera, and in a conservation area not a 20 minute
walk from my home I trekked off the trail and found three good sites (as
good as they get around here anyway), as well as a few obvious constructions
of the concrete kind.
Pictures at http://www.pbase.com/telemachu
I'm still trying to figure out if some of these are not field
clearances, either for farming or for, as you see in the pictures,
construction of concrete foundations or other building.
Things seem to be clearer in the US East than up here... although who