One of the most adored picnic spots in Beijing for locales as well as foreigners, Stone Flower Cave is a geological park. It is famous for the its multi-layered Karst cave system which is clearly divided. There are in all 12 huge cave halls, 16 cave chambers, and 71 branch caves. All these are inter connected with numerous cave channels, forming an intricate work by nature. Stone Flower caves are well lit up and present magical views of the interiors. The most visited is the Silver fox Cave which was discovered in the year 1991.