The Brocken Spectre is your own shadow, cast on mists below you, when you are mountain climbing. The shadow may appear enormous and has a ring around it. Read more about the Broken Spectre here.
Thanks to Conor Ledwith Photography for sharing this pic with us. Conor wrote:
I caught this Brocken Spectre at Lough Corrib, Galway this morning and its my most recent selfie. This is my shadow cast upon the fog with the sun on my back, its the first time I have seen or captured this optical effect. Its was great to witness this in reality.