Top Gear has earned the ire of environmentalists yet again, this time for driving cars over the Makgadikgadi salt ... The region is home to the largest salt pan in the world (take that, Bonneville!) ...

Botswana is a land of contrasting landscapes, from the vast salt pans of Makgadikgadi to the fertile plains of the Okavango ...

The area is now dominated by salt pans, but was once home to an enormous ... settled near Africa's huge lake system, known as Lake Makgadikgadi, which is now an area of sprawling salt flats.