Well, by the broadest definition, then, all life is art. We derive (or don't derive) meaning from art, based on how it is perceived through our own mental and emotional filters. I can look at a tree and derive no meaning from it, or I can study the curves of its branches and the shape of its leaves, and determine that it represents the beauty of infinite randomness somehow harnessed by nature. I can do the same thing with a Monet, or a Dali, or a salt shaker, or a salad from Wendy's that somebody left on their desk at work.
I would dare say that there are as many people who would call the intricate windings of a stream "art" as there are those who would reserve the term for a 12 foot square canvas painted solid red.