Kunming Expo Park is the main venue of the 1999 Kunming World Horticultural Exposition, a world-class park. There are 5 pavilions, 6 special exhibition garden, 34 domestic exhibition gardens and 33 international exhibition gardens. Chinese and Yunnan characteristics are mainly displayed.
If you're a bothany geek, this might be a pleasant experience for an afternoon, especially if you can get student discount. Otherwise; don't bother. The humongous jade store with a million clerks and zero customers is quite a bizarre sight, though.