Essequibo River

River in east central Guyana, the largest river between the Amazon and the Orinoco. It rises in the Acarai Mountains on the Brazilian border and flows northward for approximately 630 miles (1,010 km) through savannas and forests to the Atlantic Ocean. It reaches the Atlantic Ocean 13 miles (21 km) west-northwest of Georgetown, the national capital. Its estuary, 20 miles (32 km) wide, is obstructed