Once, it was the Great Blue Volcano

Transcript of a talk by Joe Bagley, Boston city archaeologist, on the Blue Hills' distant past as a large volcano, and why that became important to the Native Americans who, several hundred million years later, inhabited the area:

I have personally visited, excavated, and studied hundreds of Native archaeological sites throughout the east coast, and I have never experienced the types of intact Native landscapes that can be found in the Blue Hills. I do not mean intact as in undeveloped, but intact meaning the actual experience is similar today as it was in the past.

Via Boston Reddit.