The peak of the cloud is located in the east of Liuyuan and the north of Linquan Zhushuoting, which is also called Guanyin Peak because of its shape. It is one of the famous courtyard stones in Suzhou gardens, which fully embodies the characteristics of Taihu stone, such as "thin, leaking, transparent and wrinkled". Yundingfeng is said to be the relic of Huashigang in Song Dynasty (please refer to the introduction of Yundingfeng in the entry of Lingering Garden). Because the stone peak is towering and the four exhibitions are like crowns, it is named "Watching the Cloud". On the other hand, Guan Yun's name comes from Li Daoyuan's Notes on Water Classics, "The Three Peaks of Sendai, the Prince of Yan, are very majestic, soaring to the sky, and the high gorge is Yunling". This place was originally named Rui Yunfeng (moved to Suzhou Weaving Department West Garden in the spring of the 44th year of Qing Qianlong, and is now in Suzhou No.10 Middle School), and it is also said that the owner of the garden expressed the meaning of surpassing the original stone through Guan Yun.

The peak of the cloud is 5.7 meters high, the bottom is 0.8 meters high, the total height is 6.5 meters, and it weighs about 5 tons. Its height is the highest among the lakes and stones in the gardens in the south of the Yangtze River, and it is also called the four wonders in the south of the Yangtze River (except Yungaifeng) together with Ruiyunfeng in Suzhou No.10 Middle School, Yulinglong in Shanghai Yuyuan Garden and Crepe Yunfeng in Hangzhou Jiangnan Famous Stone Garden.