My parents have been traveling to Costa Rica for their dental work for years (from the US). My dad usually stays with a local family through a language-exchange program, stays for two weeks, and takes Spanish classes at their local university.

He says he's saved tens of thousands of dollars (he doesn't have dental insurance here), and gets awesome, educational vacations out of the deal.

Even my mother, who is not adventurous at all, loves it. The dentists speak perfect English and have top-tier practices.