Geograph - photograph every grid square

The Gardens were established in 1759. The gardens are responsible for the world's largest collection of living plants. The site houses four Grade I and thirty six Grade II listed buildings. The gardens were designated UNESCO World Heritage status in 2003.
Wikipedia: Link
Website: Link

Kew's third major conservatory, the Princess of Wales Conservatory, designed by architect Gordon Wilson, was opened in 1987 by Diana, Princess of Wales in commemoration of her predecessor Augusta's associations with Kew. In 1989 the conservatory received the Europa Nostra award for conservation. The conservatory houses ten computer-controlled micro-climatic zones, with the bulk of the greenhouse volume composed of Dry Tropics and Wet Tropics plants. Significant numbers of orchids, water lilies, cacti, lithops, carnivorous plants and bromeliads are housed in the various zones. The cactus collection also extends outside the conservatory where some hardier species can be found.
The conservatory has an area of 4499 square metres. As it is designed to minimise the amount of energy taken to run it, the cooler zones are grouped around the outside and the more tropical zones are in the central area where heat is conserved. The glass roof extends down to the ground, giving the conservatory a distinctive appearance and helping to maximise the use of the sun's energy.