Glass-Top Drain A strange sight: Part of the drain here seems to have had a skylight of glass, which has since been filled over. However, the collapsing ceiling began to create natural skylights of its own. Similar Images ...based on the tags: broken-glass, collapsing, how-did-this-get-here, moss, roots, skylights, tunnels, water... It’s almost hard to tell whether the colors come from oil in the water or the colorful glass lit up by the Michigan sunset. A light-painted portrait of one of the few remaining carts that moved everything from fresh eggs to soiled laundry through the tunnels. If you look close you can see a figure on the water tower. A view of the hallway outside of the auditorium. Since this picture was taken, the roof has totally collapsed in this area. Minnesota Power’s Taconite Harbor power station, as seen through the ship loading control room windows. Portland Huron and downtown Duluth from the end of the Elevator A slip. I did not take the escape ladder to the surface, but I am told it pops up in the middle of a hill next to the missile silo doors. At night the city lights blast through the broken windows, casting crazy colors through the off-white interior of the mill.