This video explores the mystery surrounding the downfall of the pre-Columbian Mayan civilization, which is still largely unknown to archaeologists and historians. The video describes the origins of the Mayan civilization in southern Mexico, and how it developed into a powerful trade network with other civilizations in the region. However, after a period of prosperity during the classical Mayan period, the civilization collapsed, leaving behind abandoned cities and derelict monuments.

The reasons for this collapse are still unknown, as there are no written records or archaeological findings to explain it. The video also explores the conflict between the powerful Mayan cities of Tikal and Kalakmul, which had its origins in the invasion and subsequent installation of a new dynasty in Tikal by the great city of Teotihuacan.

The video describes Teotihuacan as an absolutely massive city in the valley of Mexico, which ruled the trade between the civilizations of the south and the nomads of the north for about five centuries. However, the origins of Teotihuacan and its people remain a mystery to this day. Overall, the video highlights the enduring mystery surrounding the pre-Columbian Mayan civilization and its downfall.