Firedoor Looking into the main workhouse from the skyway into the annex elevator. But who care? Look at the colors! Similar Images ...based on the tags: conveyors, doors, graffiti, pipes, skyways... On the upper floors where the sunlight is yellow–the color of flour dust, once exposed to the elements. Not ghosts. Slow-moving explorers’ shadows create a ghostly effect in the ‘Old Ward’–the second floor of the Service Building. The annex casts a long shadow over its old headhouse and the former UGG (currently Vitera C) elevator. Arista 100. Dust explosions were a real risk for grain mills. These funnels helped to filter the air in the mill. The beacon was installed in 1938 and removed in the mid-2000s. A sign facing the city on an exterior wall–a sort of motivational poster. These machines are at least 100 years old. A warped mirror in the rock crusher at the rear of the complex. Rims where bulbs were, light were motors were, stairs were people were.