The Butterfly Spring is located 27 kilometers north of Dali and situated at the foot of mount Shenmo, the first peak of Cangshan Mountain. The spring from Mt. Cangshan all flows into a square shaped pool. The pool is about 50 square meters and above it is a special tree - an ancient decumbent tree. This is the famous 'Butterfly Tree', so called as in the short interval as spring turns to summer, its fragrant blossom attracts thousands of butterflies. These small multi-colored creatures fly around the pool and settle on the tree in great clusters as they sip the nectar from its blooms. So it gets the name ''Butterfly Spring''. This spectacular sight has given rise to a local festival when the Bai people gather at the tree on April 15th for the 'Butterfly Meet'. The Bai people refer to the spring as the 'Allegiance Spring' as it is here that true and lasting love may be found.