The mounds, ley lines, textiles, pottery are all clues. Maria Reiche speaks of such below. Shamanism and the mystery lines : ley lines, spirit paths, shape-shifting & out-of-body travelThe mystery of the Nasca linesperusumaq.com‘Lady of the Pampa’ Maria Reiche Made the Nazca Lines World FamousMaria cared about the lines as no Peruvian ever did