The Hidden River Festival is an annual community festival on the New River (Old River would be more accurate these days: it's been funnelling water down from Hertfordshire for four centuries) between the East and West Reservoirs. This year there's are loads music, art, theatre, food, drinks and creative workshops, including a silent disco, The Drawing Club workshops, interactive storytelling, short film screenings, community art workshops, treasure hunts, and a show from the London Community Orchestra.
