Monastir and Nabeul are both good options. The other good thing about Tunisia is that you have so many nice places you can go and it's all right there. I would

Monastir and Nabeul are both good options. The other good thing about Tunisia is that you have so many nice places you can go and it's all right there. I would want to point out that the other things that takes time to get used to is the driving culture, this can be tough to adapt to. Bare that in mind, since I know not everybody is up for the thrill