Lago Viedma is one of Patagonia's largest lakes, located in southern Argentina within Los Glaciares National Park. Fed by glacial meltwater from the Viedma Glacier, it features stunning turquoise waters and is surrounded by rugged mountain landscapes. The lake stretches approximately 80 kilometers (50 miles) in length and is a key attraction for activities such as boat tours, kayaking, and glacier trekking. Its proximity to El Chaltén makes it a popular destination for adventurers exploring the area.