High Quality Content by WIKIPEDIA articles! Kalambo Falls on the Kalambo River is a 772ft single drop waterfall on the border of Zambia and Tanzania at the southeast end of Lake Tanganyika. The falls are the second-highest uninterrupted falls in Africa. Downstream of the falls the Kalambo Gorge which has a width of about 1 km and a depth of up to 300 m runs for about 5 km before opening out into the Lake Tanganyika rift valley. Archaeologically, Kalambo Falls is one of the most important sites in Africa. It has produced a sequence of past human activity stretching over more than two hundred and fifty thousand years. It was first excavated in 1953 by John Desmond Clark who recognised archaeological activity around a small basin lake behind the falls. Late Acheulian stone tools, hearths and well preserved organic objects were found there including a wooden club and digging sticks and evidence of fruit consumption. Tools excavated from Kalambo Gorge have been radiocarbon-dated to befrom around 300 000 BC, and the hearths indicate people were using fire systematically there some 60 000 years ago.