In Volcano Natl. Park on Hawaii there's a little trail through an area of cinder called Desolation Trail. The hills in this photo were formed in 1959, I believe .The "tree" in the foreground (and a few other scraps of wood here and there) is pretty much all that's left of the vegetation that grew there prior to the eruption. The little bushes dotting the hills are relatively new.
It's a really desloate place. We did see some animal life, however: a family of wild Nene -- the Hawaii state bird. It was bitter sweet.