I saw an assemblage of stones balanced carefully on top of each other in Saulsalito, CA. The first time that i saw it i took it to be fraudulent to my eye they seemed to be cemented to one another, until is actually witnessed the artist making they the next time i went there. Balancing is play almost like dance. The stones rest in harmony upright against gravity, balancing on a small tip; preventing toppling forward fall. And then, of course, there is beauty in this craft. The artist who does this is called Bill Dan and you could also check his blog to see some other magnificent work.
I was also reminded of the artist Andy Goldsworthy whose art involves the use of natural and found objects, to create both temporary and permanent sculptures which draw out the character of their environment.