Archaeological sites, rock shelters, Swahili coastal towns and a language spoken by 200 million people: a guide to the heritage landscapes of Tanzania, and how to travel among them responsibly.
The crater is one part of an 809,440-hectare World Heritage property that also holds Olduvai Gorge, the Laetoli footprints, Maasai pastoral communities and an unresolved argument about who conservation is for.
The Afar Depression in northeastern Ethiopia holds one of the deepest records of human origins anywhere, alongside a working salt trade, an acid hydrothermal field and a persistent lava lake. It is also a region the US, UK and Canadian governments currently advise against.