Travel with Viking to Oxford University and the real "Downtown Abbey." Go behind the scenes with Karine Hagen as she explores the highlights of the Oxford & Highclere Castle cruise extension, available on Cities of Light and Paris & the Heart of Normandy cruises. You'll get privileged access to one of the world's most prestigious universities, which has educated kings and presidents plus get a chance to explore Highclere Castle, the setting for "Downton Abbey" on PBS's MASTERPIECE