These magnificent grounds were landscaped by Lancelot 'Capability' Brown between 1767 and 1773. He swept away the Tudor terraces and formal gardens, setting the castle-like house in a green park. He created a large lake in the mid-distance and introduced cedars and other exotic trees. For this he charged the Duke of Northumberland £1,956. Changes in life-style in the 20th century have obliged the present Duke to turn it into a commercial venture with a horticultural emphasis. The grounds have been adapted to cater for large numbers of visitors - the lakeside has been planted with a colourful collection of waterside plants and many 'designed' garden features have been introduced. Park Road, Isleworth, nr Brentford.