2. Tijuana (1.9 million) Tijuana, located in Baja California, is a bustling city with a total population of 1,922,523. It has a booming culinary industry and it borders the United States. 3. León ...

Those were some of the questions that we had in mind when we set out to see, film and map every foot of the U.S.-Mexico border ... There's no major city here on either side of the border.