What makes a Mexican state obscure? Having Puerto Vallarta in it? Johor Baharu is pretty well-known in Southeast Asia (it's not tiny and it's the crossing point to and from Singapore). Jeju is by far the best-known Korean island (for tourists and pork lovers, besides other things).
I guess Jellystone is not in California, and the city is not "Jeans", but my legitimate try was "Janism" which maybe should be accepted. (Save your comments; I did say "maybe".)
Jaipur and Jodhpur are pretty close though, just a 3-4 hour drive from one another. They are in the same state and are pretty much same except the population.
Can I do Quizzes N-Z in this series? I will do one a week. I've done a similar one in this style already and it was well received.
Me: Jeans