Hatfield House, Hatfield, , AL9 5NQ
Magnificent Jacobean house, home of the Marquess of Salisbury. Exquisite gardens, model soldiers and park trails. Childhood home of Queen Elizabeth I.
Mill Green, Hatfield, , AL9 5PD
An 18thC watermill, restored to working order, with a museum in the adjoining miller's house displaying local and social history and archaeology.
Steam Pumping Station Hatfield Road, Langford, , CM9 6QA
Housed in an impressive 1920s building. A large triple-expansion steam engine is the main exhibit with many other sources of power on show.