I would say Korea is vastly underestimated, they have so much potential for doing what Meiji Japan did, but it's usually derailed by either weak rulers, ultra-conservative scholar class in the government, land invasions, or all of them at once.
Hopefully, in a TL I'm working on, the area that would be OTL Montevideo, Uruguay would be the focal point. Otherwise, some other part of temperate South America would be used.And in South Am it's Paraquay and Uruquay. Paraquay had a little interest because it was a hermit kingdom with the same dictator for 30 years who took in all the Nazis. Uruquay...well...see, I can't even think anything about it.
It used to be Belize in Central Am but now they have resorts.