Look at Andy Goldsworthy's work. He has several large books filled
with photos of his work. There was also an article about him in a recent
Smithsonian (March or April?).
I teach art at a small school that emphasizes integration. While
third and fourth graders were studying ecosystems we looked at Andy
Goldsworthy's art. He uses the environment including water (invarious
forms). My students loved going out and creating art like he does.
When I challenged them by asking if this was really art they
enthusiastically said "YES". I asked them to explain what it had that
maybe a Picasso had. Before long they listed the sensory and formal
properties of art! This made me realize how much they have learned
about art using DBAE.