What two early American civilizations developed in Mexico?

The "progenitor" civilization which first developed in Mexico were the Olmecs. Their first cities appeared around 1600 BC in southeastern Mexico, along the lowlands of the Gulf of Mexico coast.

Two civilizations that took many of the traditions and cultural traits from the Olmecs include the Mayans, who inhabited the Yucatan Peninsula and parts of Central America circa 250 AD, and the Aztecs, who established their own empire on Central Mexico in 1325 AD. Both civilizations were "discovered" and eventually conquered by Spanish conquistadors between the 16th and 18th centuries.