I must say, HDR is one of my most used photography techniques! Anyway, here goes...
Taken with a Nokia Lumia 820, HDR Photo Camera app, with in-app edit as I recall.
Back story - In short, it was taken during my last ski trip in Italy - as you can see, there was practically no snow in that part of the Alps (Val di Sole) during december 2013, and the temperatures were about 10-15C during the day. But in one part of the valley, a strange phenomennon happened one day - cold air was trapped on the valley floor, causing quite a picturesque effect