No visa is required for Americans, Canadians, European Community citizens, Great Maghreb nationals (Libya, Algeria, Morocco and Mauritania), Japanese and South Koreans. A landing visa (on arrival) is available for Australians. For New Zealand, other African and Asian countries' nationals, a visa must be applied for at the embassy of coverage.
Tunisia is predominantly Muslim (Muslim 98%, Christian 1%, Jewish and other 1%) Although they are used to Western ways, you should try to be respectful. This means that Muslim conventions are best respected:
Women and men should make an effort to cover their legs and arms.
It is regarded as disrespectful to show public affection.
Be discreet when drinking alcohol.
During Ramadan -- the month of fasting -- travelers should avoid eating and drinking during the daytime. Also, be sure not to smoke in front of people, nor chew gum, and it is polite to avoid talking about the nice lunch you had.