The best time to visit Tanzania depends on your interests. For wildlife viewing, the dry season from June to October is ideal as animals gather around water sources. If you want to witness the Great Migration in the Serengeti, plan your trip between July and September. The wet season from November to May offers lush landscapes and fewer tourists, but some roads may be impassable. For climbing Mount Kilimanjaro, January to March and June to October are the most favorable months due to milder temperatures and clearer skies.

Most foreign visitors require a visa to enter Tanzania. You can obtain a visa on arrival at major entry points, including international airports, for $50 USD (single entry) or $100 USD (multiple entry). Alternatively, you can apply for an e-visa online before your trip. Some nationalities may need to apply for a visa at a Tanzanian embassy or consulate in advance. It's advisable to check the latest visa requirements with the Tanzanian immigration authorities or your nearest Tanzanian embassy before traveling.

It is not recommended to drink tap water in Tanzania. Stick to bottled water, which is widely available throughout the country. When buying bottled water, ensure the seal is intact. If you're staying in remote areas, consider using water purification tablets or a portable water filter. For hot beverages, boiled water is generally safe. It's also advisable to avoid ice in drinks and raw fruits or vegetables that may have been washed in tap water, unless you're certain they've been properly cleaned with purified water.

Several vaccinations are recommended for travel to Tanzania. These typically include Yellow Fever (required if you're arriving from a country with risk of Yellow Fever transmission), Hepatitis A, Typhoid, and routine vaccinations such as MMR, DPT, and Polio. Depending on your activities and length of stay, your doctor may also recommend vaccinations for Hepatitis B, Rabies, and Cholera. Additionally, malaria prophylaxis is strongly advised. It's best to consult with a travel health specialist or your doctor at least 4-6 weeks before your trip to ensure you have all necessary vaccinations and medications.

Tanzania offers incredible wildlife viewing opportunities. In popular parks like the Serengeti and Ngorongoro Crater, you can expect to see the "Big Five" - lions, leopards, elephants, rhinos, and buffalo. Other common sightings include giraffes, zebras, various antelope species, hippos, and crocodiles. The Great Migration, where millions of wildebeest and zebras move across the Serengeti ecosystem, is a spectacular sight. Tanzania is also a birdwatcher's paradise with over 1,000 bird species. Marine life enthusiasts can spot whale sharks, dolphins, and sea turtles off the coast of Zanzibar and other islands.