Questa foto di Chobe National Park è offerta da TripAdvisor.
As you drive into Savute from the south, you will see, on your left, a low sandy rise, the Magwikhwe Sand Ridge.
More than 100 km long, it is an old barrier beach that may once have defined the western boundary of the great lake.
Questa foto di Chobe National Park è offerta da TripAdvisor.
Beyond it, to the west, is a chaotic pattern of ancient sand dunes, which may have been lagoons and mud flats lying beyond the ridge.
Questa foto di Chobe National Park è offerta da TripAdvisor.
It is still a matter for speculation how this once massive lake received its waters.
Questa foto di Chobe National Park è offerta da TripAdvisor.
The most popular explanation is that, in the distant past, the Upper Zambezi, the Chobe and the Okavango Rivers flowed together, across the north of Bostwana and down to the sea via the Motloutse and Limpopo.
Questa foto di Chobe National Park è offerta da TripAdvisor.
Then a gentle warping of the Earth's crust dammed this flow to create a vast lake.
In time, further crustal movement caused the rivers to find a new route to the sea.
Questa foto di Chobe National Park è offerta da TripAdvisor.
Their direction changed by faulting, the Upper Zambezi and the Chobe turned to the northeast and, after plunging over the Victoria Falls, joined what is now the Middle Zambezi.
Questa foto di Chobe National Park è offerta da TripAdvisor.
Trapped by an emerging rift valley, the Okavango bled its waters into vast accumulations of sand to create today's Delta.
Questa foto di Chobe National Park è offerta da TripAdvisor.
Condemned by a changing climate, which reduced rainfall and brought a return of almost desert-like conditions, the super-lake, cut off from its sources of water, dried up, leaving only evidence in the shape of the Makgadikgadi Pans.
Questa foto di Chobe National Park è offerta da TripAdvisor.
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