Located south of the old correctional center hidden in the brush you can stumble across plenty of old remains from the quarry that operated here between 1912 - 1970's, when it was closed down. Today, Old foundations for buildings, train tracks and equipment litter the massive site, as well as a wooden train bridge that led to the stone crushing plant, which still exists but is now part of Cargil. A shooting range the guards used to use still holds bullets over 50 years old. And of course the quarry itself. From this quarry the prisoners helped build Guelph in its early years, including the nearby East Bow Truss bridge.
Also a great place for rockhounding and fossil hunting, as the quarry has exposed the reef that was here over 400 million years ago.