Aztec Account of the Conquest of Mexico - In 1519, Hernan Cortés sailed from Cuba, landed in Mexico, and made his way to the Aztec capital. The Modern History Sourcebook offers gathered Aztec accounts, some of which were written shortly after the conquest.
PBS: Conquistadors - Online companion to the series examining the explorations of Cortes, Orellana, Cabeza de Vaca, and Pizarro. Also offers an online learning adventure for students and teachers.