At the end of the tunnel is a chamber representing the underworld, or a microcosm of the Teotihuacan civilization. About 17 metres beneath the pyramid's center, a miniature mountainous landscape was used to hold objects, including a rubber ball (used in the Mesoamerican ballgame) representing the Sun. Pools of liquid mercury in some of the tiny valleys represented lakes. Also found were four greenstone statues, wearing garments and beads, and their open eyes would have shone with precious minerals. Two of the figurines were still in their original positions, leaning back and apparently contemplating up at the axis where the three planes of the universe meet – probably the founding shamans of Teotihuacan, guiding pilgrims to the sanctuary, and carrying bundles of sacred objects used to perform rituals, including pendants and pyrite mirrors, which were perceived as portals to other realms. The walls and ceiling of the tunnel were found to have been carefully impregnated with mineral powder composed of magnetite, pyrite, and hematite, providing a special brightness to the place and to give the effect of standing under the stars as a peculiar re-creation of the underworld.