Tijuana is a border city in Mexico, with it's metropolitan area and the metropolitan area of it's sister city of San Diego very nearly overlapping. The border crossing between these two cities has been descrobed as the busiest border crossing in the world, with nearly 300,000 people crossing daily.
Post-ApocalypseNot much is known about Tijuana after the outbreak began. It is unknown wheter or not it was affected by the bombing of San Diego, or whether the fifteen kilometer long border it shared with San Diego contributed in any way to the infections in Mexico. It also appears to be the home of the Unnamed Hotel.
All this is known for certain is that Nick (and possible his mother) is heading in its general direction.