(DC) (Hillwood) Explore the gardens and collection at Hillwood before taking in Mamma Mia!, a film based on the ABBA-inspired musical. Help set a festive atmosphere in our best picnic spread competition. Our judges are charmed by: themed spreads with connections to the film; early 2000s fashion and character look-alikes; props including tablecloths, flameless candelabras, and centerpieces. The winner will ...