Some years ago I took this shot...
SAM_1570 by
bartjeej, on Flickr
... but when I saw how muddy the mist became in the photo (it was much more dramatic to my eye in real life), I tried bringing in some clarity, which ended up burning away all the mist. Using a fog filter in nik effects made it look ridiculous somehow. I then spent countless hours in Lightroom using localized edits to bring back some fog while maintaining the clarity, all while trying not to make it look ridiculous (to this day I'm not entirely sure I succeeded in my goals, but I do at least like the shot now):
Fog revisited by
bartjeej, on Flickr