At the back of the South Side, where the Flats meet the Slopes, two railroads once ran above the level of the streets. One is still one of the busiest rail lines in the city. The other has been abandoned, leaving rusty skeletons like this. In dreamy moods, old Pa Pitt likes to imagine how this right-of-way—only three short blocks from Carson Street—could be repurposed for a South Side El that would connect to the subway at Station Square.