Exactly what it is but you took a great photo. I like this shot!
The small shining ball is the sun, and in front is a tree as well as part of the mountain in the background.
I find this has something quite special!
You should have seen it in real life, it was an incredible gray all around me. I was in a wild rush so I had little time to try to capture it expertly but I tried as hard as I could for the given time.