By my reckoning, there are two countries that are missing from this list (which would knock out Peru and St Lucia), and all of the distances seem to be quite a bit different from what I've measured. I've done a one minute sprint version, and you are welcome to incorporate its data into this quiz if you agree with it. I've done a 23-answer version, so even if you don't include St Maarten, Aruba and Curaçao in your quizzes, you still have all the info you need.