Here are photos from an afternoon spent across the California-Mexico border. I walked across from San Diego and spent an afternoon walking around Tijuana, mainly as a way to continue a foreign country a year streak that has dated back to 1999. This was the very first time I stepped foot on Mexican land.
It turned out to be good that I did not stay much longer, as the air quality was very poor. Still, it was interesting to see the contrast between Mexico and the United States in this area.