The city's broad central avenue, called "Avenue of the Dead" (a translation from its Nahuatl name "Miccoatli"), is flanked by impressive ceremonial architecture, including the immense Pyramid of the Sun (third largest in the World after the Great Pyramid of Cholula and the Great Pyramid of Giza). Pyramid of the Moon and The Ciudadela with Temple of the Feathered Serpent Quetzalcoatl are placed at both ends of the Avenue while Palace-museum Quetzalpapálot, the fourth basic structure of site, is situated between two main pyramids. Along the Avenue are many smaller talud-tablero platforms as well. The Aztecs believed they were tombs, inspiring the name of the avenue. Scholars have now established that these were ceremonial platforms that were topped with temples.