The Nazca lines are a series of geoglyphs located in the Nazca Desert, a high arid plateau that stretches more than 80 km (50 miles) between the towns of Nazca and Palpa on the Pampas de Jumana in Peru. Although some local geoglyphs resemble Paracas motifs, these are largely believed to have been created by the Nazca culture between 200 BC and AD 700. There are hundreds of individual figures, ranging in complexity from simple lines to stylized hummingbirds, spiders, monkeys, fish, sharks or orcas, llamas, and lizards.

The lines are shallow designs in the ground where the reddish pebbles that cover the surrounding landscape have been removed, revealing the whitish earth underneath. Hundreds are simple lines or geometric shapes, and more than seventy are natural or human figures. The largest are over 200m across. Scholars differ in interpreting what the lines were for but generally ascribe religious significance to them. The dry, windless, stable climate of the plateau has preserved the lines to this day.

The exact reason the figures were built remains a mystery. A leading theory is that the Nazca people’s motivations were religious, and that the images were constructed so that gods in the sky could see them. Kosok and Reiche advanced one of the earliest reasons given for the Nazca Lines: that they were intended to point to the places on the distant horizon where the Sun and other celestial bodies rose or set. This hypothesis was evaluated by two different experts in archaeoastronomy, Gerald Hawkins and Anthony Aveni, and they both concluded that there was insufficient evidence to support an astronomical explanation.