<human>:  When did they build the Nazca lines?
<bot>: The Nazca lines were built between 200 BC and 700 AD. They were created by the Nazca culture, who lived in the area of Peru. The Nazca lines are a series of drawings and figures that are located in the Nazca Desert. The lines are made up of a series of straight lines and geometric shapes, and they are believed to be a form of religious ritual.