CLUES
- This rare major inland delta system does not flow into an ocean or sea.
- The site has about 600,000 hectares of permanent swamps and about 1.2 million hectares of seasonally flooded grassland.
- Wildlife here has adapted its growth and reproductive behavior to the arrival of floodwater during the dry winters.
- It is home to several endangered species, including the African wild dog, cheetah, lion, black rhinoceros and white rhinoceros.
ANSWER: The Okavango Delta, Botswana