Midwest Living Review
If you're looking for a little historical context for the sights you're about to see, plan to spend an hour or so in this beautifully restored Union Building, which reopened in 2011. The 1800s structure at the edge of downtown housed immigrant groups' fraternal organizations during the town's copper boom days and impresses with spacious areas for interpretive exhibits, gleaming hardwood floors, period light fixtures, and attractive metalwork and wood railings on the stairways. You can browse two floors of well-done exhibits, such as the can't miss "NOTICE, 100-500 Cornish miners & Underground Men WANTED immediately for Calumet, U.S.A." on the second floor. Interesting, engaging and fascinating, the exhibits draw you in with stories about people and daily life in this copper mining town, including the hardships of working in the mines, surviving during the miners' strike and functioning in a parternalistic corporate structure.
Displays and exhbits do a great job tracing Calumet's (then called Red Jacket) beginnings and explosion into a major copper mining boomtown and intrepreting the dynamic and connections between the mining companies, the immigrants who came to work in the mines, the community and larger region.
It's open daily from late May through September. Winter hours are limited.