The three sites are related to Daoism and two of its
main historical proponents--Laozi (Lao Tzu), and  
Zhuangzi (Chuang Tzu).
Beijing, China.
Laozi wrote the Dao De Jing.
Zhuangzi (Chuang Tzu) lived and died.
oshobob  The Living Workshop
Dao Sites in China