.Located near National Highway No. 2 in Yen Phu commune, Ham Yen district, Tuyen Quang province. Temple   is 5 km from Dong Tien complex. Thac Cai Temple, dating from the 15th century. In the book Du Dia Chi by Nguyen Trai, the name is Tien Thiem mother (mother toad waterfall, baby toad waterfall). The front of the temple is facing the Lo River, where there is a large rocky waterfall blocking the river, the water is flowing all year round. At Cai Waterfall, a number of large waterfalls flowing strongly making loud sounds are named Hiu Tuong Cang (Elephant Roaring Waterfall), Tau Ma Cang (Gross Horse Waterfall) to express the fierceness of the falls.
In Thac Cai Temple, the ancient stele in the old shrine has the Chinese inscription: "Dai Than Thuy mouth, touching the goddess Long Mau nun". The general idea is: The big cliffs at the mouth of the river touch the Mother Goddesses". Before 1978, when the temple was still intact, on the main altar there was a statue of Long Mau and on both sides, there was a wooden statue of Nuong Than on each side. According to the ritual rituals of the riverside people, Long Mau is considered the ultimate deity, in Nom vows is called Ba Chua Thuong thousand (or Lord Ba). In that sacrifice, there are words to worship two Nuong Than gods, Ngoc Nuong and Phuong Nuong. According to legend from the Hung King era, it was Princess Ngoc Lan and Princess Phuong Dung. These two goddesses were worshiped as the main gods in the Lower and Upper Temples (Tuyen Quang City), recorded in Dai Nam Nhat Thong Chi. Thus, Thac Cai Temple originates from Lac Viet people's ancient custom of worshiping Mother Goddess. Thac Cai Temple is now an attractive spiritual tourist attraction of tourists from all over the world, associated with the Dong Dong festival. Fairy Market, Ham Yen Country Market, Ham Yen Buffalo Fighting Festival, Thut Market in Phu Luu Commune every year at the beginning of spring.
Visitors come to Thac Cai temple to pray for happiness, good luck, for national peace and prosperity, for good weather, for a bountiful golden season, and to wish people a happy and prosperous life.