alt Hacker NewsAh, sometimes it can look quite nice, or at least striking. Though usually after end of life. The Tate Modern in London is an old power station, and a disused oil power plant in Dublin (https://en.wikipedia.org/wiki/Poolbeg_Generating_Station#Poo...) has become sufficiently iconic that its operator was refused permission to demolish its chimneys; they're now protected structures.
That's fair actually!
To undermine my own point further, Battersea Power Station in London is iconic. In particular the control rooms were very well-styled with lots of art deco ornamentation, anyone who's listened to Quark, Strangeness and Charm by Hawkwind will have seen it as it's the source of the album art. To be honest I think the idea that ornament in general is bad did a lot of visual damage to the world.