Warm, turquoise waters, lush jungles, intriguing island culture, cosmopolitan shopping and a plethora of historical sites await the traveler that makes the trek to Guam. The island is an endearing mix of Asia, 1960's America and exotic Pacific island. Hosts Julie Conover and Mark Jennings venture into the little traveled parts of the island to swim in waterfalls, cha cha with the locals at the Wednesday night fiesta, and meet a refreshing group of teenagers passionate about preserving their Chamorro heritage. For the history buff, Guam's WWI and WWII sites - both above and below the sea - offer a vivid depiction of the battles of the