What is the smallest city in your country that everyone can still instantly recognise the name of? What is it famous for?
In the United States, I'd probably name Oregon City, the famous end of the Oregon Trail and the first city founded west of the Rocky Mountains during the pioneer era. Its population is only 37,000.
If world I'd guess Huskvarna (pop 24 000) for Sweden.
Known for having a company making chainsaws (among other things) named after it (Husqvarna). It is one of the two main brands of professional chainsaws (the other being Stihl).
I definitely recognized "Huskvarna" for some reason, but didn't know its location or why I would have recognized it before reading your comment. I haven't lived in Sweden or a place that would have been very easy for me to get to Sweden from.