What kinds of places and objects could be considered huacas in Inca religion?

In Inca religion, the term huaca refers to a broad category of sacred sites, objects, or phenomena that possessed magical or charm-bearing qualities. Because the concept was deeply integrated into their spiritual life, huacas could take many forms:123

• Natural Features: Physical phenomena such as mountains, hills, and waterfalls were often considered huacas, as they were believed to be inhabited by or embody spirits.12
• Man-made Structures: Shrines and temples were common huacas. These ranged from simple apachitas—cairns or piles of stones left by travelers on high mountain passes—to complex structures like bridges (such as the huacachaca over the Apurímac River) and stepped pyramids.123
• Sacred Objects: A huaca could also be a sacred object, most notably a mummy bundle, particularly those belonging to a lord-Inca.23

Essentially, a huaca served as a focal point for ritual and religious devotion, representing the intersection of the physical world and the sacred.12