So I submit British artist Andy Goldsworthy for consideration:
An environmental artist, he wanders the Scottish country side (and elsewhere) and uses no tools or implements to construct cairns, wool fences, sculptures in situ. I was not familiar with his work and was recommended to watch this video, "Rivers and Tides". While I was convalescing a few months back , I watched it. Can I say you will never take a walk in nature and view it the same way. You will have the urge to stack rocks, arrange leaves and dig holes.
How about this thing:
And this... I would love to build something like this just to confound my neighbors! Well worth it, check him out. There are also several books around about his life and work..