Tiantai Mountain is located 110km from Chengdu in Qionglai. This is the original habitat of the giant panda. The scenic area is full of dense primordial forests, bubbling streams, and gushing waterfalls. The Flower Stone Forest is a geological oddity made of gray conglomerate stone, which has been exposed to the elements and, over millions of years, worn away to create all sorts of fantastical shapes. Many visitors say it compares favorably with Yunnan's Stone Forest. Make sure to stay overnight and turn off your flashlights because the scenic area really comes alive at night with 17 native species of fireflies, located between 800 meters and 1,400 meters above sea level. Every year between April and October it's firefly watching time. Anywhere between Tiantai and Xiushui is a good place to set up and watch the natural show of lights.