The three Chinese scientists buried here built the country's first botanical garden. The unique geology, landform and climate of Lushan has contributed to its ecological diversity, which has given rise to the birth of China's first formal, research-orientated botanical garden.The geologist Li Siguang constructed his Theory of the Fourth Glacial Epoch on his discovery of the traces of the fourth glacial epoch here.[Photo by Jia Yue for Chinadaily.com.cn]