Temple opening ceremony and Hang Son pagoda are held on January 6 every year. Coming to Hang Son - Phuong Nam Ward, visitors learn about history, visit beautiful landscapes of Hang Son. 20km southwest of the city center, visitors can travel by road or waterway on the poetic Hang Mai river, with 2 banks on the banks of the centralized production area of ​​early ripe fabrics of Phuong Nam ward.

Hang Son Temple worships Thanh Hang Son - Bat Hai Dai Vuong. Hang Son's name also bears the imprint of Tran Hung Dao when he brought his troops here to ambush, store food for the battle of Nguyen Mong army on Bach Dang river in 1288. By the sixteenth century, the people around the region had Contribution and construction of the Buddhist temple and since then Son Temple, named Son Son, is a combination of Buddhism and beliefs of the people.

This is a cave created by nature, located next to a branch of Bach Dang River, consisting of a high mountain range, with all shapes. This place is charming and beautiful, poetic and beautiful, once used to be a place of sightseeing for kings, Vietnamese feudal dynasties. Currently, is attracting a lot of visitors to visit the scene of worshiping Buddha's door, remembering the merit of the National Hero.