Võ Nhai

Võ Nhai lies among limestone hills east of Thái Nguyên, on the way towards Lạng Sơn. Its mountains contain deep caves and springs, including Phượng Hoàng cave above the waters of Mỏ Gà. Stalactites fill the spacious chambers, while forested ridges rise around the valleys. The rugged country forms a transition between the lower Cầu River basin and the northern frontier hills.