Louise Bourgeois's <i>Untitled</i> (1952) reminds me of the stone towers
one finds on California beaches.  While these admittedly are taller than
any I've seen in California, they're actually less impressive.  First,
Bourgeois cheated by using a metal rod to align and balance everything. 
Second, all the stones are similar in size.  The stones in towers in
California usually vary wildly in size, yielding an interesting,
delicate, and precarious tower.