Hung Temple, a relic worshiping King Hung, is located on Nghia Linh mountain, Phu Ninh district, Phu Tho province. Every year on the 10th day of the third lunar month, this place holds a huge Hung Temple festival. Starting from the foot of the mountain, we came across the Ha Temple, which is said to be the place where Mother Au Co gave birth to a bag of hundreds of eggs. Continuing to move up will be Trung Temple, an important place where the king and mandarin meetings are held to discuss the country. The highest is the Upper Temple, the supreme position used to worship the gods according to ancient beliefs. Next to it is the Well Temple, a temple built in the 18th century, according to folklore, this is where Princess Tien Dung and Princess Ngoc Hoa looked in the mirror.