On a rainy day, we cast about for things to do while visiting northern Nova Scotia. We stumbled on this museum. I had not realized that this area had been a major coal mining area. The museum does a very good job presenting information about the area, the mines, the controversies, etc.
The crown jewel, though, the reason you should go, is the reconstructed mine with tour conducted by retired miners. After your group is fitted out with hard hats, you are taken on a tour that requires some walking while hunched over in low ceilinged areas. You can hear the fairly steady whacking of hard hats off the low timbers. A little puckering for the mildly claustrophobic. You will finish this tour feeling as though you have completed a day in the mines.