Europe’s Danube stretches 2,800 kilometres from the Alps to the Black Sea. From the great white pelican to the endangered sturgeon, it also supports a surprising range of wildlife. Find out how it’s coping with years of human impact.

Follow the Zambezi through Zambia, Zimbabwe and Mozambique, growing from a tiny trickle to the thundering Victoria Falls. En route, meet the hippos, elephants, lions and buffalo drawn to its wild waters.