Northwest Vietnam comprised six provinces, and they are home to hill tribes. The eight significant tribes live in the northwest; Lao Cai, Lai Chau, Son La, Dien Bien Phu, Hoa Binh, and Yen Bai. Each hill tribe group have their colourful fork custom. This region is an incredible place for mountain biking in Vietnam. There is no better way to enjoy the best breathtaking mountains, landscapes, different hill tribes, lovely deep valleys, terraced rice fields, and wooden stilt houses in tiny villages. This land has beautiful nature sites; wonderful lake nature, stunning waterfalls, deep caves, and vast hill farmland. The world-famous historic place in Northwest Vietnam is the battlefield of Dien Ben Phu, which was the massive French army base before the 1954- Indochina War. Northeast Vietnam is mountainous forestland including Lang Son, Cao Bang, Quang Ninh, Lao Cai, Bac Kan, Tuyen Quang, Thai Nguyen, and Ha Giang. Ethnic groups living here are Tay, Nung, H 'Mong, Dao, and Chinese, in which Tay is the most populous and oldest natives in this region. Ha Giang borders China in northern Vietnam with a fantastic landscape of limestone and granite mountains. Hoang Su Phi is a district of Ha Giang, about 300km away from Hanoi. The terrain of the area is primarily steep mountains alternating with deep valleys and primary forests. One of the most spectacular wonders of Hoang Su Phi is the rice terraces, which have recognized as a National Heritage in 2012. On the spiral mountain roads between Yen Minh and Dong Van, before crossing the Mai Pi Leng Pass to Meo Vac on spiral mountain roads. Here is where the most spectacular scenery in the country and the most conical mountains shape. Further to the East, Ban Gioc Waterfall in Cao Bang, just a tiny river cross to China territory. It's the most country's stunning waterfall. Ha Long Bay has around 1,553 km2, including 1,960–2,000 islets, most of which are limestone.