Royal attractions, palaces and castles, the Changing of the Guard... There's a wealth of Royal heritage in and around London. Don't miss the most recent addition to the Royal Parks. The Diana, Princess of Wales, Memorial Walk is a seven-mile long pathway crossing St James's Park, Green Park, Hyde Park and Kensington Gardens, which takes in many famous buildings associated with Diana en route. On the western edge of Hyde Park, near the Serpentine, is the new Diana Memorial Fountain, opened in summer 2004.