Cueva del Milodón Natural Monument is a Natural Monument located in the ChileanPatagonia, northwest of Puerto Natales and north of Punta Arenas. The monument is situated along the flanks of Cerro Benitez. It comprises several caves and a rock formation called Silla del Diablo (Devil's Chair). The monument includes a cave which is notable for the discovery in 1895 of skin, bones and other parts of a giant ground sloth called Mylodon (Mylodon darwini).