Tyne Daly, who is currently reprising her Broadway role as opera diva Maria Callas in Master Class on London’s West End, recently paid a visit the site of a real-life Callas scandal. On April, 1 Daly and her Master Class co-stars headed to London's South Quay Wharf to visit the mega-yacht “Christina O,” once owned by shipping magnate Aristotle Onassis. The yacht played a central role in a highly publicized affair between Onassis and Callas, which began in the late 1950s. The pair would cruise Europe’s exotic locations together on the “Christina O,” though they were both married to other people at the time. Click on below to see Daly and Master Class cast members Jeremy Cohen, Naomi O’Connell and Dianne Pilkington as they tour this real-life love boat.