Great Tehuelche Paleolake
The Paleolake Tehuelche is the name for several former lakes that existed in the area of Torres del Paine in southern Patagonia. These were proglacial lakes that existed next to the Patagonian Ice Sheet during the Late Pleistocene and Early Holocene.
Source: Wikipedia — Great Tehuelche Paleolake (CC BY-SA 4.0)