Just one block into Mexico in Los Algodones, the inexpensive dental capitol of California where Mexico, Arizona, and California meet. You enter Los Algodones from the USA on Calle 2 (2nd Street) turn right at the first corner 5 de Mayo (Fifth of May) and walk 2 blocks to Cuarta (4th Street) and you are at Taqueria El Pablano. Delicious Al Pastor tacos on handmade tortillas. Unequaled. My icon is their their al pastor barbecue spit. $1 each. The bigger expense is the $6 for the Quechan Tribe parking lot just across the boarder in the US. I have been going to El Poblano for 5 years since before they had an inch of stainless steel and cooked on barbecue barrels.