Tlachihualtepetl is an ancient archaeological site located in Mexico, specifically in the state of Puebla. It is known for its large pyramid, which is one of the largest in the world. The name translates to "artificial mountain" in the Nahuatl language, reflecting its impressive structure built by the Mixteca and Zapoteca civilizations. The pyramid is part of the larger site of Cholula, which was a significant cultural and religious center in pre-Columbian times. Tlachihualtepetl features a series of temples and platforms, showcasing the architectural skills of its builders. Today, it remains a popular destination for tourists and researchers interested in ancient Mesoamerican history.