Kew Gardens originated in the exotic garden at Kew Park formed by Lord Capel of Tewkesbury. It was enlarged and extended by Princess Augusta, the widow of Frederick, Prince of Wales, for whom Sir William Chambers built several garden structures. One of these, the lofty Chinese pagoda built in 1761 still remains. George III enriched the gardens, aided by William Aiton and Sir Joseph Banks. The old Kew Park (by then renamed the White House), was demolished in 1802. The "Dutch House" adjoining was purchased by George III in 1781 as a nursery for the royal children. It is a plain brick structure now known as Kew Palace. In 1840 the gardens were adopted as a national botanical garden. Under Kew's director, William Hooker, the gardens were increased to 30 hectares (75 acres) and the pleasure grounds, or arboretum, extended to 109 hectares (270 acres), and later to its present size of 120 hectares (300 acres). The Palm House was built by architect Decimus Burton and iron-maker Richard Turner between 1844 and 1848, and was the first large-scale structural use of wrought iron. The Temperate house, which is twice as large as the Palm House, followed later in the 19th century. It is now the largest Victorian glasshouse in existence.

Virginia Water: the Cascade. The original cascade, created in the 1750s, was destroyed in 1768 when the causeway collapsed. A new cascade was built when the lake was enlarged by George III in the 1780s.