Here are some theories of how people think they ended 1.warefare 2.disease 3.famine 4.disaster i disapprove feminine because i don't think they would run out of food
The mayans lived in central america around 250 A.D
One of their greatest achievements was the mayan calendar.The mayan calendar had 365.2420 days a year.This was created so we can date things like the eclipse
How i think they ended
Another achievement is their elevated road/causeway.The center of all mayan cities were plazas and most valued government or religious buildings.
And another achievement is Aqueducts.And those are Waterways.And aqueducts are an example of engineered water pressure in the new world .
I think they civilization came to an end because all civilizations had environmental disasters.And the climate struck back.And about 440 to 660 cities sprouted. And this seems like it would most likely happen.