KTNV-TV, Channel 13 sportscaster Mario Diaz does not hesitate when asked which production show tops his roster. The Bellagio's ³O² show, he says, is the best this town has to offer and has taken Las Vegas entertainment to new heights (or should we say, depths). The synchronized swimmers, divers and acrobats in the production at the Bellagio, 3600 Las Vegas Blvd. South, are incredible athletes who make the production flow with ease. And that stage, made entirely of water, is an amazing feat in itself. ³It's an hour and a half, and you're left with your mouth open the whole time,² he says.