Highclere is pretty much closed to tours until spring, but there are 70 more locations around Britain where the period drama was filmed and are worthy of visiting.
For example, last season, Lady Mary dumped Lord Gillingham near the Peter Pan Statue in London's Kensington Gardens. And historic Lancaster House, also in London, provided the glam stand-in for Buckingham Palace in the 2013 Christmas episode.
Going farther afield, Coggs Manor Farm in Oxfordshire is the site of the notorious pig farm where Lady Edith stashed her daughter Marigold until the child was brought to the family home.
It's easy to follow, comes with a top 10 list of filming locations (lots of castles) and may provide just the inspiration you need to wander into the countryside on your next trip to London.