This article has a few images that better demonstrate what is meant by "city" or "multiple sites": https://www.sciencenews.org/article/ancient-urban-complex-ec

This article has a few images that better demonstrate what is meant by "city" or "multiple sites": https://www.sciencenews.org/article/ancient-urban-complex-ecuador-amazon-laser https://www.sciencenews.org/article/ancient-urban-complex-ec...