Skeletal Skyway This ruined skyway looks like it should be at ground level because of the growth, but it’s actually the second floor of the building. Similar Images ...based on the tags: collapsing, overgrown, rusty, sheet-metal, skyways, vines... These copulas made the iron for casting. Will coming down “Darwin’s Ladder”. A little sheet metal box somehow made it back home. This building seemed like a pump house or compressor house. It was full of empty concrete mounts. Taken at a junction in the tube world. Cages and hooks to dry wet miner clothes. Easier-to-demolish parts of the power plant were torched apart. Catwalks to nowhere meant lots of dead ends. 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. The generator room was state of the art when it was installed, allowing the complex to use motors and electric lighting ahead of its competitors.