Attenborough describes the course the Amazon, starting high up in the Andes of Peru, whose streams flow into the great river. Young rivers are by nature vigorous and dangerous: they flow fast and form rapids, thick with mud and sediment.
Sail the stunning Azores as large shoals of migrating humpback whales visit its waters. A sight to behold! Plus spot the symbol of the islands, giant sperm whales. These majestic protected creatures are the biggest tourist attraction of the Azores.