It is advisable to have a passport but a citizen of Mexico or the USA can do this with a drivers license.
To cross INTO Mexico, you need...nothing. You just walk or drive through. However, in order to get OUT of Mexico, you need a U.S Passport and it's always a good idea to carry around some form of identification, just in case.
Only if you have a valid ID or birth certificate.
Legally, you can if you have a visa and show it to the border police. Illegally, you can do it the same, except don't walk past the border police. The border control is much more leniant when going from US to Mexico, because the Mexicans don't care as much. But when walking from Mexico to US, get ready to dogde bullets and run very fast from dogs and cars. Hope this helps. X
First you must get to the Mexico border. Then you simply walk or drive across. Remember however they recently passed a new law, that you must have a current passport, if you choose to enter back into the US,Legally that is.
Free if you walk across the border and don't spend any money. But seriously the dollar is strong in Mexico, I'd worry more about the gangs.
Mexico
You can do lots of fun tours, walk the freedom trail, visit fun museum's, visit the Sky Walk Observatory, and visit fun parks.
you can drive there or fly there walk there
walk north
about how long would it take to walk from east Texas coast to Mexico citey
You can visit www.independentlivingusa.com for a selection of walk-in tubs.