The true treasure of Yuyuan is the Exquisite Jade Rock. Located across from Yuhua Hall, it is one of the three famous rocks in the southern region of the Yangtze River. (The other two are Duanyun Feng in Suzhou and Zhouyun Feng in Hangzhou.) The rock is 3.3 meters (about 10.8 feet) in height and has 72 holes. What is interesting about this rock is that if you burn a joss stick just below the rock, the Beautiful pool in the Yuyuan Gardensmoke will magically float out from all of the holes. Similarly, when you pour water into the rock from top, the water will flow out from each hole creating a spectacular sight to see. Pan Yunduan was very fond of the Exquisite Jade Rock, and he built Yuhua Hall facing the rock so it was convenient to sit in the hall and admire it. The furnishings in the hall were made of top grade rosewood of the Ming Dynasty, appearing both natural and graceful.
The Inner Garden was a separate garden built in 1709, but is now a part of Yuyuan in the south. It is compact and exquisite, and the rocks, pavilions, ornamental ponds and flower walls offer some of the most attractive sceneries in Yuyuan.