This image, obtained after processing a Google Maps image, shows the network of waru-warus, that is, of the "raised fields" - earthworks separated by canals - near the Titicaca Lake (Huata, Puno, Peru). This is an ancient agricultural technique used by Andean people starting from the first millennium BC. Note that the structure of the network is created after a careful planning.
Each raised field is approximately 10 meters large and more than one hundred long.
More on waru-warus
arXiv:1009.4602 [pdf] Geoglyphs of Titicaca as an ancient example of graphic design, Amelia Carolina Sparavigna
arXiv:1009.2231 [pdf] Symbolic landforms created by ancient earthworks near Lake Titicaca, Amelia Carolina Sparavigna