Los Glaciares National Park is on the Argentine side of Argentino Lake and the glacier Perito Moreno, bordering Torres del Paine National Park in Chile. The park's name refers to the giant ice cap in the Andes range that feeds 47 large glaciers, of which 13 flow towards the Atlantic Ocean. The ice cap is the largest outside of Antarctica and Greenland.
The northern half consists of part of Viedma Lake, the Viedma Glacier and a few minor glaciers, and a number of mountains very popular among fans of climbing and trekking, including Mount Fitz Roy and Cerro Torre.
The southern part has, as well as a number of smaller ones, the major glaciers which flow into Lake Argentino: Perito Moreno Glacier, Upsala Glacier, and Spegazzini Glacier. Typical excursion boats travel between icebergs to visit Bahía Onelli, and the otherwise inaccessible Spegazzini and Upsala. The Perito Moreno is reachable by land.
Los Glaciares is a major attraction for international tourists. Starting points of tours are the village of El Calafate at the shore of Lake Argentino but outside the park, where the park's administration has its headquarters, and El Chaltén village in the northern part of the park, at the foot of the Fitz Roy. Other touristic points in the park include Lago del Desierto and Lago Roca.