A visa is required for entering into Zanzibar. Visitors can obtain visas at the Tanzanian embassy or directly at the international air and seaports of Tanzania for a charge of approx. 50 euros. A valid passport is also required. It is recommended to carry enough cash. Only the Barclays Bank of Stone Town provides the opportunity to withdraw money. Euros may only be exchanged at some hotels and in the big cities. Regarding to the fact that the inhabitants of Zanzibar are relatively poor you should be careful with exhibiting valuables. Furthermore it is important to avoid dark and gloomy places for ones own security. In respect of health it is advisable to vaccinate against yellow fever and malaria. Because of the infectiousness the prophylaxis of mosquito bites is very important. The mains water of Zanzibar is not for drinking. Sun lotion and, in the rainy season, waterproof clothing are absolutely essential. Zanzibar is an Islamic country. So, for example the choice of clothes should not be too provocative and tourists are advised to respect the local habits.