BOTSWANA // Not only is this sprawling inland delta of myriad islands and channels one of world's most beautiful wildernesses, but it is also one of Africa's most compelling safari destinations. Each year, the floodwaters of the Okavango River arrive from the Angolan highlands and expand this unique ecosystem to almost 20,000 sq km (7722 sq miles), sustaining vast quantities of wildlife and attracting famed African species galore. As waters rise under the blue skies, on islands such as Big Chief, prides of lions, packs of wild dogs and herds of buffaloes, elephants and zebra congregate for spectacular shows. In the Savute Channel, leopards have even adapted their predatory nature to hunt for huge catfish, something not seen elsewhere. And the remote nature of the delta has also made it a refuge for rhinos, with more than a hundred moved here from areas in South Africa. Unlike in many of Africa's other protected areas, safaris in the Okavango are not bound to 4WD wildlife drives. The water levels during the flood allow for exploration by both powerboat and traditional mokoro (dugout canoe). Travelling this way is a truly transcendental experience - as the mokoro is poled silently through the shallow reed- lined channels you feel immersed in the environment, hearing every bird and animal call, witnessing the mightiest of elephants crossing your path and the smallest of frogs clinging to the grass. With development and visitor numbers in the delta strictly regulated to protect the environment, the Okavango is one of the most exclusive destinations on the planet. But for adventurous souls who can handle a 4WD and don't mind camping, there are affordable options within the delta's Moremi Game Reserve.