Just started this today. I'm a bit dubious about the history here, since it seems extremely focused on colonists (who, to be fair, were the ones building the walls, but like, describing the "lingering hostilities between the colonists and Native Americans [lessening] with the end of the French and Indian wars" is just pretty... bad, and it really glosses over the fact that Native Americans were doing agriculture in the region long before the colonists were), but the geology is interesting so far, and I'm hopeful that I will be able to take some interesting history away from it, even if I need to be alert for erasure of the more horrific parts European colonialism.