is that the Disney castle in Florida, or somewhere else? I used to live a couple hours away, so we'd go all the time.
anywho, I would take it into Photoshop and work on the glow very carefully with a clone stamp (sampling from the dark sky). Using the clone will help the colors & texture blend better. There may be an easier way, but as long as you're pretty careful, I think it's definitely do-able without ruining the pic. Once you've eliminated most of the glow, it will probably still be purplish on the edges, so you could select those areas, feather the selection, and desaturate it until it looks a little more natural.
hope I'm not completely unhelpful.