archaeological center of the ventanillas de otuzco in cajamarca, peru

archaeological center ventanillas de otuzco cajamarca peru cemetery archaeology america grave antiquity dead window cliff rock ancient culture mountain bone cave old architecture stone civilization south volcanic history necropolis niches religious peruvian ruin heritage historic sarcophagus historical caxamarca inca archeology monument sarcophagi pre tomb cloud civilisation combaya funerary building northern preinca