The Nazca Lines cover broad desert plains between the valleys of Nazca and Palpa on Peru’s southern coast. People created geoglyphs there over many centuries, principally between about 500 BCE and 500 CE, during the Paracas and Nasca cultural traditions. Makers removed dark, iron-oxidized stones from the surface and exposed lighter soil beneath. The technique required no deep trenching, yet the contrast remained visible because extreme dryness, limited vegetation, and relatively stable winds slowed erosion.

The designs include long straight lines, trapezoids, spirals, rectangles, and figures of animals, plants, and humanlike beings. Some lines run for kilometers across uneven terrain, while biomorphs such as the hummingbird, monkey, spider, condor, and whale are much smaller and more intricate. Surveying the largest forms required planning with stakes, cords, and coordinated labor, but not aerial observation. Broken pottery, posts, pathways, and nearby settlements connect the drawings to communities that farmed river valleys and traveled into the pampa.

No single explanation accounts for every geoglyph. Early popular theories treated the lines as an astronomical calendar or landing field for extraterrestrials, but evidence does not support such sweeping claims. Archaeologists increasingly interpret many lines as routes for processions, gathering places, offerings, or ritual relationships with water, mountains, fertility, and ancestors. Different designs may have served different groups and changed function over time. The pampa was a worked cultural landscape, not a single coded message waiting for one universal solution.

Spanish chronicler Pedro Cieza de León noticed markings in the region in the sixteenth century, but modern study expanded in the twentieth. Peruvian archaeologist Toribio Mejía Xesspe examined the lines from surrounding hills in the 1920s. Paul Kosok recognized their great extent from the air, and German-born researcher Maria Reiche spent decades measuring, mapping, publicizing, and defending them. Her work was foundational to preservation, even though later research revised her strong emphasis on astronomy.

UNESCO inscribed the Lines and Geoglyphs of Nazca and Palpa in 1994. Roads, vehicles, mining, informal settlement, flooding, and occasional vandalism threaten marks that can be damaged by a single tire track. Access on the ground is tightly restricted, while towers, aircraft, drones, satellite images, and field survey support viewing and research. New geoglyphs continue to be identified, especially on hillsides, and changing light can reveal forms invisible at other hours. Their survival depends on protecting an enormous landscape whose apparent emptiness is deceptive: subtle lines preserve repeated acts of movement, ceremony, observation, and collective labor across many generations.