Thank you both, Doruk & Niko, Niko, my dear friend, as far as I know, this is simply caused by the mist/fog that was present towards the end of our walk, as the afternoon grew quite cold. I took this particular shot towards the setting sun, so I can only presume the light was diffracted into the glowing haze that is present in that photo. Early morning and dusk are often the best times to get this effect in my experience. I wish you luck, and wear warm clothing!! (oh...you're used to that) :-)>