Kgalagadi Transfrontier NP belongs by 3/4 to Botswana and by one quarter to South Africa.
In the park where you have to pay an entrance fee you will have the chance to see a lot of wild animals, birds and the fantastic red dunes of Kalahari desert.
Twee Rivieren is the location where Nossob and Auob rivers (dry rivers for years) merge.
On the Botswanian side there is a camp for employees where you can go to to find this geocache.