Best appreciated in large format.
If you understand Photoshop at all, here’s what was done:
1- Go into LAB mode.
2- Duplicate background.
3- Use “smart blur” and “surface blur” at different settings on each channel to get rid of the noise. You will be losing details.
4- Go back to RGB mode.
5- Adjust the opacity of the blurred layer to bring back some details from the original. You can even use the eraser to work on problem areas.
6- Create two “Photo Filter” layers.
7- Set one of these two adjustment layers to “Overlay.” This will give you deeper shadows and change colors all at once.
8- Play with the opacity of the two adjustment layers.
9- Duplicate the blue area from the towers’ tips.
10- Use “Gaussian Blur” on this new layer. The towers and the sky are glowing but it’s too much.
11- Change opacity. Now it’s better and more natural.
12- Add another adjustment layer, this time it will be “Curves.”
13- Make a slight S curve.