I don't know if this blog actually counts as a spoiler, but just in case you don't want to know or guess the order of the locations...

This article/section features spoilers. Continue reading at your own risk.

Up to episode 10 the locations are pretty much confirmed, but after that most of the locations are not obvious by the episode title. What do you think that might be the location for episodes 11 to 21? Episodes 12 and 14 are very obvious, 15 is probably New Zealand because of the "maori" in the title, and I think 20 is either Argentina or Mexico because of the Spanish title. (blog edited with locations of episodes 11 to 20)

The remaining locations are: New York, Lethbridge, Vietnam, Indonesia, Bahamas, Las Vegas, Finland, Darjeeling, Russia, the Arctic Circle, Argentina, and Mexico.