Cassiobury Park is the principal public park in Watford, Hertfordshire, in England. It was created in 1909 from the purchase by Watford Borough Council of part of the estate of the Earls of Essex. It comprises over 190 acres (0.77 km2) and extends from the A412 Rickmansworth Road in the east to the Grand Union Canal in the west.
Cassiobury Park has been used as a filming location in a number of cinema films and television programmes due to its proximity to several major film studios such as Elstree studios. In 1997 Whippendell Woods served as a Star Wars filming location when it provided the backdrop of a forest on the planet Naboo which featured in the scene in Star Wars Episode I: The Phantom Menace, in which Qui-Gon Jinn (Liam Neeson) and his Jedi apprentice Obi-Wan Kenobi (Ewan McGregor) first meet Jar Jar Binks (Ahmed Best).