The Ucayali river in Peru changing its course in a period of about 20 years. ➖ The Ucayali River arises about 110 km (68 mi) north of Lake Titicaca, in the Arequipa region of Peru. The Amazon River takes its name close to Nauta city (100 km upstream/south of Iquitos), at the confluence of the Marañón and Ucayali rivers. The Ucayali becomes a major tributary of the Amazon River. Navigation was blocked by lengthy sections of rapids. The city of Pucallpa is located on the banks of the Ucayali. ➖ Th

High in the Peruvian Andes, the Marañón River often called the parent of Amazon, carves a path through some of the deepest canyons on Earth — a twisting, thunderous corridor of rock and water that quietly shapes the destiny of an entire continent. Long before the Amazon becomes a sprawling rainforest super-river, it begins here: in a narrow gorge where glacial melt, Andean storms, and ancient fault lines combine to form one of South America’s most important waterways.For thousands of years, its