Location: The cave is located atop Phuong Hoang (Phoenix) Mountain, 45km from Thai Nguyen City along National Road No. 1B in the Thai Nguyen-Lang Son direction.
Characteristics: The cave includes 3 layers: the upper layer is Doi (Bat) Cave, the central is Sang (Light) Cave, and the lower is Toi (Dark) Cave.
Visitors spend around half an hour climbing up to the cave. Seeing from its foot, the mountain has the shape of two laying phoenixes. Legend goes that a long time ago, there were a couple of phoenixes living very happily and they were born two eggs. Everyday, the father bird looked for food and the mother bird sat the eggs. One day lured by a new flock, the father bird forgot his task and did not come back. Until he remembered his task and returned to the nest, his wife had been transmuted into a rock. Feeling regrettable, he laid on the opposite mountain, looking toward the nest with the hope that his wife could revive. Waiting hopelessly for a long time, he was also transmuted into stone. Since then the mountain has been named Phuong Hoang (Phoenix).
Reaching the mouth of the cave, visitors can see the landscape of this land. The Light Cave is spacious and well-ventilated. The stalactites in the cave glitter fancifully thanks to the light from the three main mouths of the caves. Visitors can freely imagine the forms of these stalactites such as a mother is carrying her son on her back on the way to the field, ancient people are hunting wild animals, and lanterns.
At the foot of the Phuong Hoang Mountain, there is Mo Ga (Chickenï¿½s Beak) Stream Cave. Its entrance is 100m wide and there is a stream that flows out from the cave. In front, there are many small waterfalls, bathing places, rocks, and small rocky islands. The water is clear and the landscape is fantastic.
The Phuong Hoang Mountain is the most beautiful in Thai Nguyen with the imposing landscape and beautiful cave. The site attracts many visitors. Phuong Hoang vestige and the stream in Mo Ga Cave were listed as National Sites by the Government in 1994.