The Yuyuan, or Garden of Contentment, is one the best gardens in China. It is near a famous old tea house with a zigzag bridge in heart of the old city of Shanghai. The garden was originally made, in 1559, for a retired scholar-administrator, but has often been damaged and rebuilt. Many of the garden features are excellent: the dragon wall, the moon gate, the long roofed corridor-bridge and a brilliant collection of garden windows and doors. The artificial mountain, made of yellow rocks, is thought to survive from the original design and to be the work of Zhang Nanyang.