Brazzaville, the largest city and capital of the Republic of the Congo, grew significantly once a railroad connected the city with Pointe-Noire on the Atlantic coast. Navigation on the Congo River, the principal transportation route for Central Africa, is blocked downstream from Brazzaville by a series of cataracts known collectively as Livingstone Falls. Products bound for export from the African interior are shipped to Brazzaville by river craft, then transferred to the Congo-Ocean Railroad for overland transport to the port of Pointe-Noire.