The Two Harbors Depot Museum, housed in the former Duluth & Iron Range Railroad Depot in Two Harbors, MN, is on 6th Street near the Lake Superior waterfront. It features exhibits reflecting the development of the Lake County area, with special emphasis on the three main local industries: iron mining and associated railroading, timber extraction and milling, and commercial fishing.
There are two historic locomotives on outdoor display, and the building is also home to the Lake County Historical Society's administrative offices and archive storage, as well as a small gift shop. I've visited several times and the photos on this page are from various dates.