I like Mittenwald in Germany its small but in a great location with first rate mountain views and a short train ride to Innsbruck. Goslar (in the Harz) is nice too and both are small and relaxing but if you want somewhere warmer the villages in Sicily might work well but there are so many all with varying attractions its hard to pick one but these seven were short listed and I tend to agree because I know five of them and they are first rate.
Novara di Sicilia
San Marco d’Alunzio
Another option is Gozo in the Maltese Islands but maybe that is a bit too quiet.