When it comes to creating and building structures like this, there’s no room for error, and every single pipe, girder, rivet, and component has a purpose. I wish I knew what that purpose was. Natural gas? Gasoline or some other petroleum? If so, shouldn’t those be sheltered? Chicago has some pretty good thunderstorms and the (thankfully) occasional tornado. Why are there so many parallel pipes, going in so many different directions? This structure caught my eye from a distance on one of the Calumet River industrial tours, and this photo of it is by far my favorite. I wish I had the least clue what it is.

July 15, 2012. Nikon D90 (DX sensor), 70–300mm Nikon zoom lens at 300mm (35mm equivalent: 450mm), f/16, 1/90, ISO 200.