Ancient pyramid hiding 'gateway to the underworld' could hold secrets of advanced society [View all]
Sinead Butler
20h
An ancient pyramid in Mexico was found to contain liquid mercury, a rare element discovered in its underground chambers, and this find has led to further theories as to what the structure was used for.
The Quetzalcoatl temple (otherwise known as the Feathered Serpent Pyramid) in the ancient city of Teotihuacan, Mexico, is estimated to have been built around 800 and 1,900 years ago.
Not much was known about the temple's purpose, but in 2015, researchers discovered "large quantities" of the rare and toxic liquid mercury, leading them to theorise the structure was used to "look into the supernatural world".

Instituto Nacional de Antropología e Historia (INAH)/Sergio Gómez)
Located at the end of a 338-foot-long tunnel, the mercury was found in the hidden chambers.
What is the supernatural connection?
Back in those days, water was thought of as a gateway that linked the supernatural worlds, and like water, liquid mercury is also reflective.
More:
https://www.indy100.com/science-tech/ancient-pyramid-gateway-underworld-secrets-advanced-society