The falls straddle the border between Zambia and Zimbabwe, in the heart of two national parks -- the Mosi-oa-Tunya park on the Zambian side and the Victoria Falls park in Zimbabwe, which collectively form a UNESCO World Heritage Site.

CNN: Victoria Falls ... without the bungee jumping

When Celtel, a mobile-phone operator, set up in Zambia eight years ago, it concentrated on the densely populated corridor between Victoria Falls (on the border with Zimbabwe), Lusaka and the industrial copper belt.

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Political unrest in Zimbabwe has wrought havoc with some of Rovos' most popular itineraries taking tourists to see Victoria Falls.

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