Daily:  Ha`aheo `O Hawai`i Exhibit.  Cleopatra’s Barge was an opulent yacht built in Massachusetts in 1816. It became The Royal Yacht of King Kamehameha II but was wrecked in 1824. It cost about $50,000 to build, and about the same amount for luxury furnishings. Marvel at the opulence of this beautifully crafted ship, whose splendor was breathtaking for its day.  Kaua`i Museum, 4428 Rice St., Lihue.  Open 10 a.m. to 5 p.m., every day except Sundays.  Admission is $10 adults,…