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I like it. I like the toning. Nice job.
For the halos, you can use a soft clone tool with it's mode set to 'darken'. Then you sample the areas adjacent to the edge of the tower. Because it is set to darken and the tower edges are darker than the surroundings (the areas where you are sampling), the tower edges will not be affected, so you don't have to be very careful.
I would also do this on the trees in the lower left. It's quite bright behind some of the branches and it's a bit of a distraction IMHO.