Hanoi is located in northern region of Vietnam, situated in the Vietnam's Red River delta, nearly 90 km (56 mi) away from the coastal area. Hanoi contains three basic kind of terrain, which are the delta area, the midland area and mountainous zone. In general, the terrain is gradually lower from the north to the south and from the west to the east, with the average height ranging from 5 to 20 meters above the sea level. The hills and mountainous zones are located in the northern and western part of the city. The highest peak is at Ba Vi with 1281 m, located west of the city proper.