What is the Hidden Mystery of Teotihuacan Pyramids in Mexico?

These pyramids contain an obscure mystery buried underneath their structure.

This complex is an imprint of it's unique architectural splendor that has stood the test of time for thousands of years.

These pyramids weren't discovered until the late 19th Century by accident. Until this day, many archaeologists are still mystified as to why this monument were abandoned and left forgotten for thousands of years by us?

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Acknowledgements:

All Google Earth images for education purposes only.

Universes in Universe photos for educational purposes only

True purpose of Liquid Mercury under Teotihuacan Pyramids video by Ancient Insights
https://www.youtube.com/watch?v=dinBbxUZpyg

Megalithic Mexico: Why Teotihuacan and Tula Appear to be much older than what we have been told video by Brien Foerster
https://www.youtube.com/watch?v=nU689JQrcys

The Pyramids at Teotihuacan Mexico video by Amazing places on our planet
https://www.youtube.com/watch?v=PibnTBi1rrQ

Music by tobylane, Muzaproduction, PenguinMusic, AlexGrohl and Guiden from Pixabay.