Lào Cai Province than with snowing conditions. Fog and frost are a common phenomenon in the province. Lào Cai is a mountainous region. In the northwest of the province is Phan Xi Păng (also called Fansipan; elevation , snow covered during winter season), Vietnam's highest mountain. It is located in the Hoàng Liên Sơn and the Hoàng Liên National Park. The Sa Pa Mountains form the western part of the province. While the province is drained by over 100 rivers, the main river that bisects the province is the Red River, (), the most significant river of northern Vietnam, which flows out of
Si Phan Don Si Phan Don The Si Phan Don (; meaning "4000 islands") is a riverine archipelago in the Mekong River, Champasak Province in southern Laos. Si Phan Don is part of the Khong District, including the islands and part of the mainland in the east. Si Phan Don is dotted with numerous islands, half of which are submerged when the Mekong River is in flood. The principal islands of Si Phan Don are Don Khong (the largest), Don Som (the second largest), Don Det and Don Khon. Si Phan Don borders Cambodia and historical and cultural ties link the people on