National heroine Lady Trieu led the nation in an uprising against the northern invasion in the 3rd century.
The temple dedicated to Lady Trieu was built on Gai Mountain in Phu Dien Village, Trieu Loc Commune, Hau Loc District, close to National Road 1, and 137km from Ha Noi. Travellers often stopover at the mountain to pay their respects to the heroine and to admire the view.
Thanh Hoa