Itá Letra, las «letras de la piedra» del Ybytyruzú

Itá Letra means "letters of the stone" and is an archaeological site in the Ybytyruzú hill system, at the far east of Villarrica, about 18 km from the city, within the Ytororó district. It holds pre-Columbian rock engravings, discovered in the 1950s, which for a time were attributed to a Nordic presence in the Americas. The National Culture Secretariat declared it national cultural heritage by resolution 609/2018 and cites thermoluminescence and carbon-14 datings of between 5,200 and 350 years before present. A 2011 study by Spanish archaeologists from the Altamira Museum, reported by the press, ruled out the Nordic theory and spoke of an engraving more than 5,000 years before Christ; since the figures differ depending on the source, take them with caution. The drawings show animal tracks, constellations and references to female fertility. A trail links it with Cerro Akatí, and it joins the area's hikes, together with Cerro Mymýi.

The site became known in the 1950s and has been debated since. The 2011 studies placed it as the work of peoples predating the Guaraní, with carvings between 2,500 and more than 7,000 years old.