The Original Tumblr This might have been part of the Pioneer Pellet Plant. It looks to be a ball mill, which pulverizes ore by spinning it with thousands of ball bearings. Similar Images ...based on the tags: flywheels, graffiti, mills, pillars, pipes, rusty... A printing press in the attic of the Reception Hospital. All electrical rooms were surrounded by walls, for obvious reasons. Now all the walls are gone, for reasons less obvious. The copula stacks were fitted with scrubbers. Making metal is a very polluting activity. A sign facing the city on an exterior wall–a sort of motivational poster. A caustic tank in one of the unremodeled brewhouse backrooms. This section retains water and is mostly shaded, so moss has found a way to live in the concrete. Dust explosions were a real risk for grain mills. These funnels helped to filter the air in the mill. This part of the workhouse was sheathed in fiberglass, but now you can see its insides from a mile away. The old way to get to the elevator from the mill.