San Cristobal de las Casas, in Chiapas state in the south of Mexico has great, great food. Among the local specialties are little tasty treats called chalupas. While not quite tacos, they are close enough to be included in this thread.
I had my first taste of pork in 19 years last night to try them. I was so hungry after an 80km cycling tour through the mountains, and they just looked sooo good. Turns out they tasted even better than they looked. Crispy fried tortillas topped with lettuce, sweet potato, carrot, corn, shredded beats, white Mexican cheese and pork with a delicious spicy salsa poured over it all. And only five pesos (45 cents Canadian, more or less) each! I started off with three and went back for a couple more.
I won´t be able to post my own picks until I get back home but I found a few online that look a little like the ones I had yesterday.