At the end of the road through Montaña de Oro State Park there's a warning siren[1] that will go off if there's a problem at the Diablo Canyon facility. Every time I get out there and see it there's a part of me that expects it to start to blare... and I'm totally glad when I'm "disappointed" and it doesn't.
[1] http://www.andremount.net/vanstravaganza_iii_2010/images/ful...