West Flanders is the only Belgian province that is located on the coast. The western and northern part of the province consists mainly of the flat polders, cut in the west by the river IJzer, which flows into the sea in Nieuwpoort. The interior is less flat, and in the south there is the West Flanders Heuvelland, with the highest peak the Kemmelberg (156 m). The southeast of the province is intersected by the river Leie, which flows further to East Flanders. In the extreme southeast the provincial border is formed by the Schelde.