For the archaeologists the main activities by the Incas at ushnus would have been liquid libations and offerings. For this reason, ushnus were equipped with wells and canals. In the present article the author first defines the nature of ushnus of Cuzco, then analyzes the ushnus located outside this llacta, and later examines their differences and similarities. Also, he see if the ethnographic data in addition to the archaeological and ethnohistorical information, can help us understand the functionality of ushnus in regard to their architectural configuration as spaces for liquid libations and offerings during the Tahuantinsuyo.