The Yellala Falls (Rapides de Yelala or Chutes Yelala; also
spelled as Ielala) are a series of waterfalls and rapids on the Congo River
just upstream from Matadi in the Democratic Republic of the Congo. The falls
are the lowest of a long series of rapids that render the river unnavigable,
forcing colonial explorers to travel by foot as far as the Stanley Pool 350
kilometres (220 mi) upstream. The
Congo is the third largest river in the world by volume of water discharged,
and the deepest in the world. The section of river that ends with the Yellala
falls has over 300 species of fish.
The Yellala Falls were reached by Europeans as early as
1485, when the Portuguese explorer Diogo Cão took a group of men as far as the
falls before they were forced to turn back by disease, probably malaria. In that place he set a padrão, a large
stone cross-shaped semaphore, endemic to Portuguese exploration, which was not
discovered until 1911. The stone bears the words: "Aqui chegaram os navios
do esclarecido rei D.João II de Portugal - Diogo Cão, Pero Anes, Pero da
Costa." ("Here arrived the ships of illustrious John II, King of
Portugal – Diogo Cão, Pero Anes, Pero da Costa".).