The three Sierra Madre (Occidental, Oriental and del Sur) mountain ranges difficult road movement in Mexico.
because there was no place and Mexico is small
South east, past Central America.
http://www.seniorcitizenjournal.com/travel-articles/senior-travel-Mexico-central-America-and-bus-tours/. this link has information on central America senior trips.
I do not know except is it cheap. But you can go farther south in central America and in the caribbean just as cheap. Mexico is filthy and unsafe. Travel elsewhere!
It depends on the route you take, but you need to travel across most of Central and South America.
mountains blocked travel between areas
mexico's central plateau makes up more than half of the country's area. most of mexico's people live here. however, the surrounding mountains make it hard for people to travel to and from the central plateau.
Yes, individuals with a green card can travel to Mexico.
no unless you want to risk going back to prisin
From the US? Yes it is, if your destination is Mexico (capital: Mexico City), the country which lies south of the United States. If you mean New Mexico (capital: Santa Fe), that would be considered as domestic travel.
Yes, a baby needs a passport to travel to Mexico.