Caral is an important site in the Supe Valley of central Peru near the coast and was part of the Norte Chico civilisation. It was occupied during the third millennium BC, although some push that back as far as the fourth millennium. Caral is claimed to be the oldest urban settlement in the Americas(a), although other sites in the region may challenge that. Arthur D. Faram has written a petroglyphic study of Caral(c).
A 2021 article from the History Channel suggests a date of around 2600 BC for the Caral complex and that it was abandoned about a thousand years later(d).
The 600-hectare site includes a pyramid complex that may have preceded those of the Egyptians. An early quipu was also found at the site suggesting some form of continuity with the later Inca civilisation.
In the 1950s, further south, in the Manchay Valley near the capital Lima, Karola Siebert was convinced that she had found Atlantean remains, while further south again, over the border in Bolivia we have Jim Allen’s chosen location for Atlantis near Lake Poopó.
A French website(b) has on offer the strange idea that the longitude of Caral in Peru and that of Xian in China and their respective relationships with the Prime Meridian at Greenwich and the longitude of Giza have some bearing on the location of Atlantis, which the author, Fabien Pardo, places in the Antarctic!
I reject all South American locations as possibly Atlantean and do so principally because the idea of an attack on Athens being launched from the west coast of South America, thousands of years ago, is, to put it kindly, just silly. However, it is quite clear that this region has had a fascinating prehistory and should keep archaeologists busy for generations to come.