This motorway gantry was reflected in the water of the canal.
While tidying it up later I liked the little spots of algae on the water and decided to flip it and suddenly I was looking up at a motorway designed by Gaudi with a sky full of a thousand stars and a galaxy in the corner.
Well done. I stood gazing at the photo for a while trying to make out how it looked upside down until I read your story. I have been to Barcelona one year ago and visited works of Gaudi, including the magnificent Sacrada Familia and can understand why the shot reminded you of him.
Great shot.
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Ian