This rock is carved out of the granite bedrock at one of the high points in Machu Picchu. All the rock that did not contain "holy aspect" was removed, and this is what was left. In addition to having a great connection to the earth, the Incas were also astronomers. During the Equinoxes and Solstices the edges of this carving align with geographic features in the distance. This may have been used to help the Incas determine agricultural planting times.