Situated on the border between Zambia and Zimbabwe, the waters of the Zambezi river plunge vertically in to a 100 meters (354 ft) deep but only 50 to 70 (+ 60 ft) meters wide gorge, an eroded fissure in the basalt plateau that forms the shallow valley of the upper Zambezi. The total width of the Victoria falls can reach up to 1708 meters (5,604 ft) and the enormous volume of water tumbling down makes it the largest waterfall in the world. 

Although the water level wasn’t that high - the dry season was coming to an end -  the sheer amount of water roaring down, throwing up clouds of spray, thundering like a freight train passing by, makes it a most imposing and overwhelming scenery. Imagine the effect it must have after the rainy season, when the whole width is just one great continuous waterfall (though somewhat less perfect for photography from a practical point of view due to the spray).