Cape Palmas is a headland on the extreme southeast end of the coast of Liberia, West Africa, at the extreme southwest corner of the northern half of the continent. The Cape itself consists of a small, rocky peninsula connected to the mainland by a sandy isthmus. Immediately to the west of the peninsula is the estuary of the Hoffman River. Approximately 21 km (15 mi) further along the coast to the east, the Cavalla River empties into the sea, marking the border between Liberia and the Côte d'Ivoire. It marks the western limit of the Gulf of Guinea, according to the International Hydrographic Organisation (IHO).