Waterworld Africa

On the eastern coast of Africa lies a subtropical realm of staggering beauty and diversity--a mangrove forest where saltwater meets fresh and a variety of secretive forest dwellers work feverishly to survive. Take a thrilling journey into this rarest of ecosystems, one that few get to witness.

For the animals of the Okavango Delta, life itself depends on a fortuitous natural anomaly: a river that cuts through the mighty Kalahari Desert. Embark on a tour of this accidental paradise, where a colorful ecosystem of plants, animals, and birds flourish in the unexpected abundance.

African penguins were once the most numerous sea bird on the continent--until their population was decimated by human activity. Visit a rare colony at South Africa's Boulders Beach and see how these master divers and ocean hunters are staging a remarkable revival.

During the dry winter season on the savanna, life is ruled by water. From gargantuan hippos to nimble antelope, explore how the wildlife of South Africa's lowveld adapt to the harsh conditions of their ecosystem.

Unlike the many freshwater lagoons in South Africa, the Langebaan consists of 18.5 square miles of saltwater from the Atlantic Ocean. Of all the creatures that rely on it, two are pivotal for its own rejuvenation and sustenance: the regal flamingos and the nutrient-producing prawns.