In Quechua, "Killa" is Grandmother Moon, "rumi" is stone, and "yok" is power. This energy place south of Urubamba is connected to the Moon, and to water, and to frogs, who are messengers to the spirit world.
You can feel the power of the water descending into the mossy nook, past the large naturally occurring stone which looks like the head of a frog.
The symbol for the Moon is carved into a huge boulder. The Incas also undercarved a section of rock wall, exposing natural patterns in the stone which look like two stars. There are caves here, and cermony can be done thanking Mama Killa and Pachamama.
Then it's time for a picnic and enjoy watching a tiny mother and baby goat hopping over the rocks.