Cueva del Milodón Natural Monument is a Natural Monument located in the Chilean Patagonia,[1] 24 km (15 mi) northwest of Puerto Natales and 270 km (168 mi) north of Punta Arenas.

[2] It comprises several caves and a rock formation called Silla del Diablo (Devil's Chair).

In 1896 the cave was explored by Otto Nordenskjöld and later it was recognized that the skin belonged to Mylodon – an extinct animal which died 10,200–13,560 years ago.

Other animals found at the site include the equine Hippidion, the saber-toothed cat Smilodon and the large camel-like ungulate Macrauchenia[3] Diverse elements of human habitation are found[4] at Cueva del Milodón including fire-fractured rock, lithic tools and human remains.

Human habitation at Cueva del Milodón is dated as early as 6000 BC.