Hidden city in a valley with unusual weather for this time of year

The hidden city of Galtranderndmpbarndingtown.
Hometown of our hero.... Gerb (pronounced Gerb).
Also, all the mist in the great land comes from this place. it's... uh.. magic fantasy mist.
Also, check out some unneeded close up crops of the painting.
Also, check out the Progress GIF at the bottom of the posting, if you're into progress GIFs at bottoms of postings.