Ventanillas de Otuzco, Cajamarca, Perú. (Small Windows of Otuzco) is a pre-Inca necropolis, containing 338 niches in a rocky hillside about 8 km (5 miles) northeast of Cajamarca. It is not clear exactly when the niches were built, but they were probably started around 300 BC, by a culture that pre-dated the Caxamarca.