Vietnam coastline is long. At its narrowest point in the central Quảng Bình Province, the country is as little as across, though it widens to around in the north. Vietnam's land is mostly hilly and densely forested, with level land covering no more than 20%. Mountains account for 40% of the country's land area, and tropical forests cover around 42%. The northern part of the country consists mostly of highlands and the Red River Delta. Fansipan (also called as Phan Xi Păng) which is located in Lào Cai Province is the highest mountain in Vietnam, standing high. The Red River Delta
Phu Kao–Phu Phan Kham National Park Bua Lamphu Province. The park's area is . The park's western section is located in the Phu Kao mountain range and the eastern section in the Phu Phan Kham mountain range of the Phu Phan Mountains. The park's western section is home to numerous caves hosting prehistoric rock paintings such as Tham Palan Hai, Tham Muem and Tham Rakha Khanit. Ancient artifacts of the Ban Chiang era have also been discovered in the area. The rock paintings and artifacts are estimated at more than 3,500 years old. In 1985 the park was established as Thailand's 50th national park. Part of