Because long stretches of its main line traverse areas without water, Santa Fe was one of the first buyers of diesel locomotives for freight service. The railroad was known for its passenger trains, notably the Chicago–Los Angeles "El Capitan" and "Super Chief" (currently operated as Amtrak's "Southwest Chief"), and for the on-line eating houses and dining cars that were operated by Fred Harvey. Several of these "Harvey Houses" survivemost notably the "El Tovar", which is positioned right alongside the Grand Canyon, and La Posada Hotel in Winslow, Ariz.