Yes, this is the site that was once known as Mystery Hill. The investigation of this site, by an amateur archaeologist, in the early 20th century(he thought it was the work of Medieval Irish monks) led eventually to the formation of several organizations dedicated to the study of this site and similar sites in the Northeast. The one organization that still exists is the New England Antiquities Research Association(NEARA). Here is their website, although it is bring revamped, and there is not much to see there at this time:
NEARA
I became deeply involved in researching these sites in late 70's, and for a time was research director of the Rhode Island chapter of NEARA.
The bottom line at present is that the leading competing theories, regarding stone cairns, is Native American vs. colonial and Post colonial field clearing by sheep farmers. The notion that some of these sites were the product of megalithic cultures from Europe has fallen out of vogue quite some time ago.
Here in Rhode Island, the Narragansett tribe is fully invested in a Native American origin for many of these stone "mysteries" Here is a site in Hopkinton, RI that was recently preserved and dedicated by the Narragansett:
Manitou Hassannash Preserve ? Hopkinton Historical Association
And here is a good guide to such sites in the Northeast:
Stone Structures of Northeastern United States
I have hundreds of photos of sites I investigated, most from RI, and may create a thread sometime to provide examples of cairn fields, balanced or perched boulders(some resembling Old World dolmens, but which may be glacial in origin), standing stones, stone chambers, etc....
