Opened in the mid-20th century, the enormous Hearn Generating station was designed to power the entire city of Toronto and then some. At one point in time it had multiple smokestacks and burned coal, then was converted to burn natural gas. Because of pollution concerns and economical issues, the plant was shut down in the 1980's. Since then it has shown up in a number of film and television shows, such as the preteen TV movie Goosebumps: Welcome to Dead House, where it stood in as a chemical factory during an intro scene where the characters are driving through Unwin Avenue, or as the show calls it, Dark Falls. Although it's historical and an important Ontario building, it's not very safe. Unfortunately an accident occurred there in 2008 when a photographer fells three floors down a coal chute and had to be rescued, dying a few days later. Therefore, the building is locked up, although trespassers do try to get in. Many people think that Hearn should be torn down or converted into something new.
^A prop newspaper from Goosebumps: Welcome to Dead House with the Hearn plant standing in as a chemical factory that killed all the residents of the fictional town of Dark Falls. For some reason most of the smaller text is illegible, but parts of it say "What is the damage to our lovely town? Should we evacuate?" and "Accident at Chemical Factory Kills Workers".
^Unwin Avenue Bridge and Hearn Smokestack - in Welcome to Dead House (1996), compared to the present day.