West Lake is surrounded on three sides by 'cloud-capped hills' and on the fourth by the city of Hangzhou. Its beauty has been celebrated by writers and artists since the Tang Dynasty (AD 618-907). In order to make it more beautiful, its islands, causeways and the lower slopes of its hills have been 'improved' by the addition of numerous temples, pagodas, pavilions, gardens and ornamental trees which merge with farmed landscape. The main artificial elements of the lake, two causeways and three islands, were created from repeated dredgings between the 9th and 12th centuries. Since the Southern Song Dynasty (thirteenth century) ten poetically named scenic places have been identified as embodying idealised, classic landscapes - that manifest the perfect fusion between man and nature. West Lake is an outstanding example of a cultural landscape that display with great clarity the ideals of Chinese landscape aesthetics, as expounded by writers and scholars in Tang and Song Dynasties. The landscape of West Lake had a profound impact on the design of gardens not only in China but further afield, where lakes and causeways imitated the harmony and beauty of West Lake. The key components of West Lake still allow it to inspire people to 'project feelings onto the landscape'. The visual parameters of this vast landscape garden are clearly defined, rising to the ridges of the surrounding hills as viewed from Hangzhou.