This 1917 photograph of Nahuel Huapí Lake in the Patagonia region of Argentina is from the Frank and Frances Carpenter Collection at the Library of Congress. Frank G. Carpenter (1855–1924) was an American writer of books on travel and world geography, whose works helped to popularize cultural anthropology and geography in the United States in the early years of the 20th century. Consisting of photographs taken and gathered by Carpenter and his daughter Frances (1890–1972) to illustrate his writings, the collection includes an estimated 16,800 photographs and 7,000 glass and film negatives. The 7581-square kilometer lake takes its name from the Mapuche language, in which nahuel is tiger and huapí means island. The lake is also the site of Argentina’s oldest national park, established in 1934 on land donated to the Argentine state in 1903 by Dr. Francisco P. Moreno.