The Malaspina Glacier in southeastern Alaska is the largest piedmont glacier in the world. Situated at the head of the Alaska Panhandle, it is about 65 km (40 mi) wide and 45 km (28 mi) long, with an area of some 3,900 km2 (1,500 sq mi). It is named in honor of Alessandro Malaspina, an Italian explorer in the service of the Spanish Navy, who visited the region in 1791. In 1874, W.H. Dall, of what is now the U.S. National Geodetic Survey, bestowed the name "Malaspina Plateau" on it, not realizing its true geological character.