Documentary about Plitvice National Park in Croatia, Europe's oldest and one of its most beautiful national parks - a network of crystal clear lakes connected by thousands of waterfalls. Its ancient beech forests are a stronghold for wolves, lynx and bears, animals that almost became extinct during the Balkan civil war and are now recovering. Hidden beneath the trees are spectacular limestone caves, home to salamanders and cave voles.

Africa's wildest river is home to the most spectacular wildlife. Hippos fight for territory while herds of elephant, water buffalo and zebra depend on it for life. In the wet season the rains burst the riverbanks and everyone, including people, must move whilst fish swim through the villages. In the dry season the creatures fight over the few pools of water while predators prowl. At its heart it plunges over Victoria Falls and into wild ravines before draining into the Indian Ocean, where storm clouds cycle the water back into the heart of Africa.