Cueva del Milodón Natural Monument is a Natural Monument located in the Chilean Patagonia, 24 km (15 mi) northwest of Puerto Natales and 270 km (168 mi) 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 ground sloth called Mylodon darwini, from which the cave takes its name. It is also part of the End of the World Route, a scenic touristic route.