You will require a passport valid for at least six months after your date of entry. If you are arriving from a country in which yellow fever is endemic (such as Kenya), you will require an immunization certificate or health card. Citizens of the UK, the US, Canada, Australia, and most countries in the EU, need a tourist visa to enter Tanzania. Application details and forms can be found on Tanzanian Embassy websites. As with all visa matters — contact your local Tanzanian Embassy for the latest information.