The strangest thing in Cottonwood Flats is what my fellow Don Valley explorer Rudy Limeback calls “Slab City.” That’s as good a name as any that I can think of, so I’m going to run with it. Slab City is a series of concrete and asphalt slabs piled about 5–7 feet high that runs along the bank of the Don River in Cottonwood Flats. A very short portion of Slab City is visible in this view from Bing Maps as the jumble of big square rocks near the middle of the frame. I don’t know anything about the origin of the slabs, or when or why they were placed along the river. I do know that their placement predates my first bike ride around the site sometime in the late 80s. They are all reinforced concrete and some have a layer of asphalt on top of them, so I’d speculate that they were part of a bridge deck at one point. The Leaside Bridge was rebuilt in the 1960s and is close enough that this site would have been a convenient dumping ground. That’s just conjecture, though. A more fanciful conjecture is that they’re the remnants of the Bayview Ghost. Note that I don’t actually believe this to be the case, but wouldn’t it be awesome if it was? Check out the short gallery of Slab City below the fold.