Zambezi River , bordering ZambiaZambia and Zimbabwe. Described by the Kololo tribe living in the area in the 1800’s as ‘Mosi-oa-Tunya’ - ‘the Smoke that Thunders’. In more modern terms it is known as ‘the greatest known curtain of falling water’. Columns of spray can be seen from miles away as 546 million cubic meters of water per minute plummet over the edge (at the height of the flood season) over a width of nearly two kilometers into a deep gorge over 100 meters below. The wide basalt cliff, over which the falls thunder, transforms the Zambezi from a wide placid river to a ferocious torrent cutting through a series of dramatic gorges.