I always like the old saying "A weed is only a flower growing in the wrong place". Here's a great example. A sunflower of some sort found a spot to grow next to the arbor vitae in the backyard. I assume the seed was dropped there from the birds as we feed sunflower seeds in the winter.
I just don't have the heart to pull such a sunny and smiley flower from its "wrong" place. What a nice surprise to find.