I've never been much of a fan of either William Walton or Edith Sitwell, but I've always loved Facade (An Entertainment). It's clever throughout, but also very beautiful and haunting in many places.
Here is part of it recited by Dame Sitwell and Peter Pears:
My favorite recording of Facade is from 1971 with Neville Mariner conducting, and wonderfully recited by Fenella Fielding and Michael Flanders. I wish they'd re-issue it.
Hat tip to Lapinbizarre.