Some more monuments: {old and new}
The following pictures are of some of the sorts of monuments I am finding at the intersections, or along the lines of the geometry in Nova Scotia:
This Dolmen sits atop a cliff face above Halifax harbour. Its vantage gives a clear sight to a few of the other points.
Unfortunately, the local teenagers have used the dolmen as a palette for their artistic endeavors for some years. It is a very large structure on three blocks
This view shows what appears to be a common feature of the dolmens here in Nova Scotia: a distinctly flat surface on one side.
Here is a nice view from the cliff face over Bedford Basin to Bedford.