What to expect
The rocks draw your attention first. Then look down: a channel has been worked into the stone, with straight sections and sharp turns. Water engineering rather than another city wall. Ask how the channel follows the terrain; Cumbemayo becomes more than a photo between rocks.
How it fits into a journey
Visit from Cajamarca and return to the same base. Allow time to look, accepting extra stops only if they do not reduce the site visit.