Cañuelas is a town in Buenos Aires Province, Argentina. It is the head town of the Cañuelas Partido. It is located near the outskirts of the Gran Buenos Aires conurbation. It is claimed that dulce de leche was invented by the dairy Estancia La Caledonia near Cañuelas on June 24, 1829 by chance. The area was also home to the first dairy factory in Argentina at La Martona.