article: Orinoco
links: Atlantic Ocean Ciudad Bolívar Orinoco crocodile Trinidad and Tobago Venezuela Puerto Carreño Alexander von Humboldt River mouth Brazil Ecology Colombia Amazon river dolphin Guiana Shield Steamboat Mining Endemism Guaviare River World War II Rio Negro (Amazon) Amazon River Source (river or stream) Christopher Columbus South America Delta Amacuro Tributary Puerto Ayacucho