Located at 1,500 m above sea level, Sapa has many natural sites such as Thac Bac, Thuy Cung Grotto, Gio Cave, Troi Gate, and Truc Forest. Sapa is also the starting point for many climbers and scientists who want to reach the top of Fansipan Mountain, the highest mountain in Vietnam at 3,143 m. Hoang Lien Son Mountains is also called the Alps of the North Sea area since Fansipan Mountain is not only the highest peak in Vietnam, but also in the Indochina Peninsula. The pyramid-shaped mountain is covered with clouds all year round and temperatures often drop below zero, especially at high elevations.