Finding the U.S. border effectively closed to them by drastic measures put in place by the Trump administration, thousands of Latin American migrants trapped in Mexico are gearing up for the hard trek ...

While it is largely unknown who built the pyramid in this city in south-central Mexico (and why), historians believe it was erected around A.D. 100 prior to the existence of the Aztecs in the area.

And migrants continue to arrive in Mexico from Central and South America.