Southern Patagonian Ice Field in the area, among which are the Upsala (765 km), Viedma (978 km) and Perito Moreno (258 km) in the Los Glaciares National Park in Argentina, and the Pío XI Glacier or Bruggen Glacier (1,265 km, the largest in area and longest in the southern hemisphere outside of Antarctica), O'Higgins (820 km), Grey (270 km) and Tyndall (331 km) in Chile. The glaciers going to the west flow into the fjords of the Patagonian channels of the Pacific Ocean; those going to the East flow into the Patagonian lakes Viedma and Argentino, and eventually, through the rivers "de la Leona"
Patagonian Welsh now bilingual in Welsh and Spanish. The Welsh people first arrived in Patagonia in 1865. They had migrated to protect their native Welsh culture and language, which they considered to be threatened in their native Wales. Over the years the use of the language started to decrease and there was relatively little contact between Wales and the Chubut Valley. The situation began to change when many Welsh people visited the region in 1965 to celebrate the colony's centenary; since then the number of Welsh visitors increased. In 1945 and 1946 the BBC World Service broadcast radio shows in Patagonian Welsh.