The Plaza de las Tres Culturas, located in the Tlatelolco neighborhood of Mexico City, is a historical and cultural landmark that symbolizes the confluence of three eras in Mexican history: the pre-Columbian, Spanish colonial, and modern independent nation. The plaza is home to significant archaeological ruins, colonial architecture, and modern structures, reflecting the complex layers of Mexican heritage. It also serves as a poignant reminder of the Tlatelolco Massacre, a tragic event in Mexico's history, commemorated by a memorial within the plaza.