Changuu (Prison Island) Over the course of its history, this tiny island has held enslaved people in transit and served as a quarantine zone. Today, it's a giant tortoise sanctuary. Engaruka Ruins The culture that built these Tanzanian ruins displayed advanced knowledge of irrigation technology before mysteriously disappearing. Kilwa Kisiwani Ruins Stunning ruins of what was once the center of one of the greatest empires in East Africa. Kuza Cave This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins. Laetoli Footprints Human ancestor’s 3.6 million year-old footprints. Lake Natron A salty red wasteland in Tanzania is a breeding spot for endangered flamingos. 1 2 3 4 Next »