Federal investigators returned a 500-year-old document signed by Hernán Cortés, the Spanish conquistador who captured the Aztec empire, to Mexico.

A stolen 16th-century manuscript signed by the Spanish conquistador Hernán Cortés has been found and returned to the Mexican government, the FBI said Thursday. The rare item offers a glimpse into the government of New Spain,

The United States Department of State recently issued a Level 2 advisory for travel to Mexico. The advisory level is "exercise increased caution,” and spotlights crime and terrorism in the country. Travelers can take extra precautions in advance of visiting the country—keep reading to learn how.

The update carries significance for American travelers and the U.S. government as it warns of homicide, carjacking, robbery and kidnappings.