Secrets in the Cities

Not sure how many people know but if you stand in the throne room in the Lordaeron ruins above Undercity and you turn up your ambience all the way you can faintly hear Arthas and his father exchanging words right before Arthas kills him. I snuck into the city last weekend to see if it was true. I think this kind of thing is so cool in terms of the story line behind WoW and am just curious if any of the Alliance cities have anything like this that people have found out about.