Okay here is the deal; I enjoy watching travel shows, but I don't travel out of the U.S.. In these shows the host travelers wander around describe everything, describe the people, the flavors, the festivals, everything except the smells. Yet I see local people in these shows walking down the street with a cloth over their nose & mouth. I see market places with outdoor meat markets, spices, smoke, flies, fried everything....there has to be a permeating smell of regions. I see filthy looking gutters, and standing pools of fetid looking water and smoking Trabants or 2cycle powered trikes. Here in the U.S. certain cities and area reek or have different odors.
Near the Kraft food plant here it can smell the cheesiest; near the 3M plant the adhesive can smell like pineapple...but not in a good way...
What do other places smell like?.... I heard that Asians think Americans and Brits smell like beef.

¿ǝʞıl llǝɯs ɐılɐɹʇsnɐ sǝop ʇɐɥʍ