In 1931, Robert Shippy from an airplane was able to see an unk | UnManifest History

In 1931, Robert Shippy from an airplane was able to see an unknown object, more precisely, a long wall and a powerful defensive rampart, a total length of about 80 km. The structure was called the Great Wall of Peru.

It can be concluded that the ancient peoples of South America could build a huge, technologically complex project.

But who and how exactly built the wall is a question for historians.
Which, however, demonstratively ignore such an artifact.