I'm not talking about anything musical I don't think (as in the wah wah pedal Jimi Hendrix made famous) but I have heard on several programmes about a place called "Wah Wah". Bam Margera once mentioned the place in one of his shows as did the Bloodhound Gang in the song 'Pennsylvania' - so i'm guessing it is most probably a building/place in that state.
An odd question I know, but damn it is starting to bug me