Shouldn't be too terribly hard to find, only took a minute to hide it after all! If you're hunting around the tree, you're on the wrong side of the water. Container is large enough to place objects or leave some behind for others :)
Legend has it that there was a little boy who sat right here at this spot and played his flute; once on sunrise, again on sundown. He did this routinely every single day and loved to play his songs for the spectators that could hear him playing. When no one was around he would serenade the tree and the grass, until one day; he lost his memory from an accident and could no longer remember how to play his flute...and he never came back again.
In fact, he was never really there in the first place because this story is entirely made up; I don't have an interesting backstory to this location, my wife and I were just cruising around one day and thought it would be a neat place to hide our cache!