Another National Park here in Massachusetts is Saugus Iron Works. Located in Saugus, MA it encompasses one of the first Iron works in the colonies and created some of the best iron outside of Spain.
There is a collection of buildings that can be visited including a nail forge as demonstrated by Ranger Brandon here:
One of my favorite pieces of this park was the small map of the original site. Reminded me of a similar map I saw in Munich…
There is also a project to get the river cleaned up by taking out the phragmites that are choking the river. By taking them out, the river will flow quicker and take out the sediment that has settled on the bottom. It will make the river healthier and bring back even more animals. When I was there, they had orioles, frogs, eels, little fishes, and signs of groundhogs. So well on their way.
Saugus Iron Works is open until the end of the month and is free.