Industrial past

I have something with ruins - confirmed. And the area I live offers lots and important ones.

Today I walked around the industrial past (late 19th century) and reached the tunnel of the train that used to carry the minerals down to the port:

What impressed me was an engine I found of that age. The crankshaft is exposed and when I saw the rods I said to myself "is it stuck ?" but no! I managed to turn the crankshaft with my foot and it actually felt quite smooth :)