The featured photo has been enhanced using GIMP Colors->Auto->White Balance followed by Colors->Auto->Color Enhance. It is the featured image because it’s more intense, but there is too much purple in the roof, and, arguably, in the fog. Here is the original.
This is a close up, not enhanced. (Because it is all fog, the over-purple effect of white balance and color enhance ruined it.)
In the next set, the first is original, the second, enhanced with white balance and color enhance. Very different feelings.