The most important attraction of the Island of the Moon is the Inakuyu, or Temple of the Moon. Ascending three levels of farming terraces from the port, reaching an esplanade, are the ruins of the temple. The construction has 35 rooms and carved doors. The entire housing complex had two floors and staggered figures and trapezoidal niches can be seen on its front. Next to the façade there is a patio where ceremonies were held, such as the Cuya Raymi Killa, which coincided with the Spring equinox.
During the Inca period, the Temple of the Moon was an "AjIIa Wasi" or "House of the Chosen Virgins of the Sun", which welcomed the most noble women of the empire, where they learned the work and trades such as spinning, weaving and cooking, in order to be chosen as the emperor's concubines. It is said that only the Inca, the highest authority of the empire, could enter the island. Other researchers claim that young women destined for human sacrifice were also purified.