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 the Cerro Benitez Mountains. It comprises several caves and a rock formation called Silla del Diablo (English: Devil's Chair).
The monument is notable for the discovery in 1896 of skin, bones and other parts of a giant ground sloth called Mylodon (Mylodon darwini). The remains of a Mylodon that had walked throughout the Patagonia is still visible today.
At the entrance of the monument is a life size replica of a prehistoric Milódon. The Milódon were very large herbivores and somewhat resembled a large bear. The Milódon became extinct at the end of the Pleistocene Epoch.
The investigations made possible to determine a survival of the Milodon of about 5,000 years back and confirm the existence of other animals, like the "Dwarfed Horse", the "Saber Tiger" and the Great Guanaco denominated "Macraucheria"