太阳金字塔和月亮金字塔（Pyramid of the sun and moon）都是举行宗教仪式的祭坛。太阳金字塔是古印第安人祭祀太阳神的地方，它建筑宏伟，呈梯形，坐东朝西，正面有数百级台阶直达顶端。塔的基址长225米，宽222米，塔高66米，共有5层，体积达100万立方米。和埃及的胡夫金字塔大体相等，基本上是正方形，而且也正好朝着东南西北四个方向，塔的四面，也都是呈“金”字的等边三角形，底边与塔高之比，恰好也等于圆周与半径之比。内部用泥土和沙石堆建，从下到上各台阶外表都镶嵌着巨大的石板，石板上雕刻着五彩缤纷的图案。缘阶而上达塔顶是一座太阳神庙，现已被毁，据18世纪西班牙历史学家考证说，当初这座庙金碧辉煌，高大的太阳神像站立在神坛中央，面对东方，端庄严肃，胸前佩带着无数金银、宝石的饰物，当阳光射入庙堂时，周身闪射着耀眼的光芒，使人肃然起敬，当年就在这里杀人以祭祀太阳神。
The Pyramids of the Sun and Moon are the two largest monuments in the ancient Mexican city and religious complex of Teotihuacan. The Pyramid of the Sun is the second largest pyramid in the new world, after the Great Pyramid of Cholula. The Pyramid of the Moon is at the top (northern) end of the Avenue of the Dead (Miccaohtli in Nahuatl), and the Pyramid of the Sun is to the east of the avenue, about a third of the way south.
The Pyramid of the Sun is about 225 m. on each side and 63 m. high. It is built over a cave, which was used for ritual purposes; that may be the reason the site was chosen. It has exactly 365 steps, and in spring equinox people climb to the top dressed in white to receive good energy. The Pyramid of the Moon is smaller
