Given that I have a deep affection for moss, wood, and nature in general, this picture holds me!
There is great contrast in the heart with its surroundings which makes it pop. It's not centered which I think works well in this case (so many photos are centered which does not allow my eyes to wonder).
Some of the moss seems a little muted and the background smudged out. I'm curious to see the original photo if this was enhanced but if it wasn't, I am curious to know what time of the day this was taken to get such a dark background.