I'd have to say that half of them, I have really no idea where I was, or whether the place in question actually had a name! One particularly memorable meal was on a bus journey to Satun Province in Thailand. It was just a chicken dish at a dusty bus station, but wow, it was quite fantastic - the kind of food that teases every sense of taste you have and leaves it tingling afterwards.

(Actually, I had a similar experience in Seoul. It was in a fairly beaten-up little shopping mall near the Namdaemun fish market, all served on metal plates. I found Korean food very good at having this kind of effect, too.)

I can also think of places near Peshawar in Pakistan (Afghan food from near the refugee camp on the road to the Kyber pass - no idea what I ate, but it was great), a shashlik vendor two streets from the Registan in Samarkand, numerous hole-in-the-wall places for "point at the bubbling pot of curry" in Himachal Pradesh, a "bring us your fish and we'll cook it for you" place near Fort Cochin where they let me into the kitchen to get some recipes, a hut selling soba near the shrines at Nikko, a rooftop café in Mumbai that does an outstanding dhal makhani, an unassuming bar near the docks outside Lisbon that did an incredible "catch of the day" platter, and a czevabdinica that was recommended to me in Sarajevo (by a then-refugee friend). I could probably find them again if I went back (or spent some time on StreetView where available...)

I also remember having particularly good rabbit and spaetlze with pine nuts, chicory-heavy espresso, flammekueches and the like at the CROUS (university restaurants) in Strasbourg (Louis Pasteur). Can't remember if they let non-students in, though.