Thay Pagoda, one of the oldest pagodas in Vietnam is located at the foot of Sai Son mountain in Quoc Oai district, Hanoi. The temple was established in the 11th century during the reign of Ly Nhan Tong of the Ly dynasty. It is dedicated to Vietnamese Thien master Tu Dao Hanh (1072-1116). Take a day bike tour Hanoi, cycling on the back roads to visit Thay pagoda as well as its surrounding villages.