A small park around a clear spring under a banyan tree, north of Xizhou. The site is associated with one of the most-told Bai folk tales and is the supposed origin of the legendary butterfly swarms that gave the spring its name.
The butterflies are largely gone — but the spring itself is still pleasant, the park has a small Bai folk-culture exhibit, and the location combines well with a visit to Xizhou and Zhoucheng. The 1959 Chinese film Five Golden Flowers, partly responsible for popularising Dali tourism in China, was filmed here. Modest entrance fee; about 20 km north of the old town.