Aspect a part of something cacao beans which are used in making chocolate mesoamerica region that stretches from central mexico to the northern part of central america maize corn observatories buildings designed to study astronomy and view the stars obsidian a glasslike volcanic rock pacal maya king who ruled the city of palenque in the 600s palenque ancient maya city rebel to fight against authority yucatan peninsula part of mexico bordered by the gulf of mexico, the caribbean sea, and the pacific ocean