For me one of the most incredible parts of the Mighty Zambezi is the source. Deep in forest near a little town called Mwinilunga in the North Western corner of Zambia, this immense river begins as a tiny spring in the roots of a Msasa tree. It trickles away as a stream for nearly fifteen kilometres before becoming an actual river. When one considers that the river itself is two kilometres wide in places, this all seemed pretty extraordinary to me. Whether that expression on my face reflects amazement or ‘what the hell have I let myself in for now,’ I am not entirely sure.