Being a relatively regular user of King's Cross railway station in London, I often pass under its new diagrid structure roof support above the new concourse. And, it being such an interesting piece of engineering (well, to me anyway!), I often try to get another (and better) photograph of its lattice work tubes and beams. Here is my most recent, and possibly best photograph, one that shows off the dramatic purple lighting as well as something of its symmetry.
photo © T. Boughen Camera: Olympus OMD E-M10