Foundation or Enclosure?

When I came across the photo below, I questioned the house foundation theory implied, and instead thought about some previous posts about some circular enclosures some of us had written about:

http://rockpiles.blogspot.com/2012/01/unique-enclosure-opening-to-swamp.html

http://rockpiles.blogspot.com/2012/01/another-circular-wall-in-ga.html

http://rockpiles.blogspot.com/2012/01/stone-circle-wiccopee-area-of-putnam.html

http://rockpiles.blogspot.com/2012/01/circular-stone-wall-montville-ct.html
and I believe there are more.

"The Keystone Arch Bridges Trail: Magic in the Berkshire Mountains" - Tuesday, April 6, 2010

    “In a patch of forest in the Berkshire Hilltowns of Chester, Becket and Middlefield, monoliths loom: Monuments of mechanical magic, spans of spatial interpretation, stone apparitions framed in thick-treed horizons growing from gorge walls and fording a wild, steady cascade. Visionary bridges to the tomorrow of yesterday… Usually it isn't until the dwelling is gone, evidence of life left behind in stone and scrap, that we wonder: What happened here? The question raises new walls atop sill plates of the past, ghosts hidden within…”

Photo credit: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgc_7pARsEMXkK3IL2Vty7UGuhMBzD4RHImIHN-xzdy-vfXus96qmpUH1TOH7MdzYlf3YlzbH1UAOV0jVJ3ESrB5adyvp-zmKPKH0FGnbJCrFxBdVklIMuipUHO1e4iIQQ201YCg/s1600/HPIM0347.JPG

From the blog post: http://explorewmass.blogspot.com/2010/04/keystone-arch-bridges-trail-magic-in.html