THERE IS PLENTY TO DO WHEN YOU VISIT WATFORD. Watford is just northwest of London. Warner Bros. Studio Tour Watford features props, costumes and sets from the Harry Potter films, including wizard shopping street Diagon Alley. Cassiobury Park has sports facilities and a nature reserve with wetlands. Watford Museum focuses on local history. Herts Fire Museum displays firefighting equipment dating from as far back as the 1850s. Why not take in a match at Watford FC? Click here to discover everything.