These are all over the place in Norway (as are they everywhere else, presumably!) When we moved to the island we currently live on, our address was in a road called 'Solsteinen' (The Sun Stone), but I didn't think anything of it until I realized that the roughly hewn stone serving as the property limit marker was juuu-uuust touched by the sun on Winter Solstice. Aha. A quick call to the local archaeologist confirmed…
> as are they everywhere else, presumably! They aren't "all over the place" in the US, and I certainly don't have a local archaeologist that I can just call up. FWIW: The Northeastern US is quite recent with human presence. It wasn't settled until after the last ice age. Pretty much anything old is celebrated because there is so little of anything old.
Fun fact, New England has at least 71 different stonework “prayer sites” that are all astrologically aligned.
Two of the most notable are King Philip’s Cave (Sharon, MA) with a stone aperture through which a "dagger of light" appears specifically during the winter solstice, and Pole Hill (Gloucester, MA) which has fixed boulders that align with the summer solstice sunrise/sunset and the winter solstice sunrise.
Here is a research paper talking about all of them: https://neara.org/pdf/wantofanail.pdf
There are lots of historical preservationists in New England that you can call up. If you want my help finding one let me know where you are located.