La Laguna Estigia (The River Styx or The Styx), also known simply as Laguna Estigia, is an 1887 Greco-Roman painting by Filipino painter  Félix Resurrección Hidalgo. It is a companion-piece for Hidalgo’s other painting entitled La barca de Aqueronte. Like the La barca de Aqueronte, the La Laguna Estigia is based on Dante's Inferno, the painter pursuing the theme leading towards a “darker” and “more somber interpretation” of it.