> 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.

> 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… The Northeastern US is quite recent with human presence

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.

Ohio was populated with numerous earthworks, the Hopewell Earthworks finally being recognized as a UNESCO world heritage spot after being preserved for years by being used as a golf course. Unfortunately many of these have been lost as European settlers destroyed many of them. This continues to this day as Google is building a data center in central Ohio a top of land that was home to numerous native american burial mounds - https://www.datacenterdynamics.com/en/news/google-breaks-gro...

Norway also wasn't populated until after the last ice age. As an American archaeologist, old stuff is also quite common here. The fun examples I like to use are the structures in Tucson older than Rome.

Your "local archeologist" is one of the staff at the state historic preservation society [0], though you'll likely have more luck contacting a local university archeologist if you find anything.

[0] https://www.ohiohistory.org/preserving-ohio/state-historic-p...

As the other replies note, there are things. Many were destroyed though and so there is nothing to preserve. However much of North America lacks ready access to building materials that will last and so many of the natives built with organic goods that rotted away in a few decades and so there isn't much to find. You can find many flint arrowheads - but that only tells us when (about) it was made and since there are millions of them there isn't much to learn anymore.

Don't take the above as a sign that the natives were uninteresting or stupid. Just that they didn't leave much for us to learn from, both because they couldn't and because what they did was destroyed.