To the east, near the Nicaraguan border, the Caribbean lowlands broaden to an extensive area known as La Mosquitia. Unlike the western part of the Caribbean lowlands, the Mosquitia is Honduras's least-developed area. Underpopulated and culturally distinct from the rest of the country, the area consists of inland savannah with swamps and mangrove near the coast. During times of heavy rainfall, much of the savannah area is covered by shallow water, making transportation by means other than a shallow-draft boat almost impossible.