The London home of the Duke of Northumberland, Syon House contains some of Robert Adam's finest interiors.
The Gardens contain a spectacular Great Conservatory in landscaped parkland.
Open Apr-Oct, House WThSu 1030-1630 (tours on WTh), Gardens WThFSSu 1030-1630.
A supervised indoor play area and outdoor adventure playground for children up to 12 years old. Café.
Open please see website.