Final answer:
The Incan Temple of the Sun in Machu Picchu, Peru consists of the Temple of the Sun and the Ruins of the Three Windows. These structures were used for religious rituals, timekeeping, and agriculture.
Step-by-step explanation:
The structures mentioned in the question are part of the Incan Temple of the Sun in Machu Picchu, Peru. The temple was built in the mid-1400s and dedicated to the sun god.
It consisted of a Temple of the Sun with two windows for winter and summer solstices, as well as the Ruins of the Three Windows. The temple and its various structures were used for religious rituals, timekeeping, and agricultural purposes.