Heritage Open Day: Clumber Park will offer free admission for all on 6 September 2024. Simply enjoy a stroll around the park or join the knowledgeable visitor experience volunteers to learn more about the history of this magnificent ducal estate. Carved out of the ancient forest of Sherwood, Clumber Park is a beautiful expanse of parkland, heath and woods covering more than 3,800 acres. For over three centuries, the park was the country estate of the Dukes of Newcastle.