Son is located far north at the 0 km landmark
of National Highway 1A, more specifically at Huu
Nghi Quan (Friendship Gate). This is an important
transportation link between Vietnam and China.
The main ethnic groups found in that area include
the Kinh, Tay, Nung, Dao, and Ngai.
annual average temperature is 21.5°C with
an annual humidity of 82%.
tourist sites include Tien Pagoda, Tien Pond,
Nhat Thanh Cave, Nhi Thanh Cave, Tam Thanh Cave,
and Mau Son Resort.