Walking the reconstructed 1646 ironworks that taught colonial America to make its own metal
Saugus was built to make things, and the buildings still say so. Four stops over 0.1 miles, about 34 minutes of walking. The story for each stop plays as you arrive, so nothing has to be looked up and nobody has to be followed.
It works as well at eight in the morning as it does at dusk. Stop for coffee, pick it back up.