The Tarija town and province is one of the most wonderful places to live in South America I have seen in 4 years of almost full time travelling there.

Wonderful people (friendly, educated, hard-working, etc)
lots of things to do (if you like outdoor adventures),
excellent food, very low cost of living, very clean.
Vineyards, desert, whitewater, etc.

Probably the most reasonable local government I have seen ANYWHERE in south america.

Very unexpected—does not fit the stereotype of Bolivia (“full of short people who are freezing, wrapped in colorful blankets, and watching their 3 llamas”)