A large necropolis whose gravesites are small square window niches carved out of a hillside, Otuzco was created by the Caxamarca culture, probably around 500 B.C. The niches were funereal tombs for elites. Many held just one body; others housed several corpses. Another 20km (12 miles) beyond Otuzco are the even more impressive (and better preserved) burial niches of Ventanillas de Comboyo. More extensive than Otuzco, they are holed out of a sheer volcanic cliff.