Apocalyptic SF that I've read

In my quest to find some apocalyptic SF to read I realised that I had already read a couple. These are the ones that I can remember.

• The Wild Shore - Kim Stanley Robinson. Probably the weakest of the Orange County trilogy but still worth a read. Also not sure it qualifies because only the US gets destroyed.
• I Am Legend - Richard Matheson. Brilliant, scary, scary book.

I've seen far more apocalyptic films. Not sure why, maybe because Hollywood keeps churning them out? :-)