Heritage Open Day: Ifield Watermill is only open to the public for a select number of days across summer. As Crawley’s only remaining mill we offer a unique experience of viewing the watermill alongside milling machinery and the history of the building and local area. Join us to experience the beauty, power and tranquillity of Ifield Watermill, the second largest waterwheel in Sussex. There are four floors for visitors to explore which tell the fascinating story of the watermill’s history, its use as an iron forge and later as a corn mill and to learn about the restoration work that has been vital to the building’s survival.