Quite interesting - Mayan day/nights and earth periods

[Raman]

underground cities are a curious case. what was the reason they were built ?

to keep a portion of south american population continue the work they are doing, at the wake of the future invasion and conquest by spanish or others ?

to be a place for the soon-to-start 4d civilization to live while the 3d population fades out ?

to be a place for the harvested and dual activated to live out their life and start the 4d society when the surface gets uninhabitable ?

It is intriguing. Ra stated that that was part of the 6d group's contribution to LLO...(besides cities built by the 3d group possibly under guidance)....the thing is if some cities (and structures) were built by a 6d group, it could have a reason not to be satisfied at that time. Some cities were built by the 3d group (underground too) so why does it take a 6d group to do this as well?

And it seems the search for "El Dorado" was part of the spanish going to south america. Maps were available at that time...even many thousands of years earth was known to be a sphere. Even Plato knew of Atlantis.
So information was available at the time of Columbus.

But then, it seems those cities were never found by europeans.