The Pacific sparkles toward the horizon from nearly every room in this magazine-featured mansion on Billionaire's Beach. Glass doors slide open to a glass-railed terrace, wetsuits hang by the alfresco shower, and a ficus reaches up the inner courtyard toward the mezzanine. Linger by the fireplace or in the media lounge, mingle over foosball in the games room, and drive 2 miles to Malibu Pier.