Impossible Planet

Explores the extraordinary contrasts of Diamond Beach in the shadow of Iceland's Vatnajökull glacier, and the Dreamtime story of how Lake Hillier got its glorious color.

A string of beautifully-rounded boulders in Moeraki; the turquoise, lavender, magenta and gold Rainbow Mountains of China and Peru; the crystal wonderland of the Jewel and Ngiligi Caves.

Algae glowing like hundreds of lights underwater; the Australian outback; the witch's cauldron in Hell's Kitchen, where grey mud boils perpetually.

The hexagonal columns of Giant's Causeway; the La Brea Tar Pits, which preserve over three million Ice Age species; the Thingvellir, where tectonic plates meet.

Fascinating geysers in the U.S., New Zealand, and Iceland; pancake rocks; nearly 50 million Christmas crabs make their journey to breed.

Russia's Lake Baikal, the largest, oldest, and deepest freshwater lake on the planet; South Africa's Suwala Caves, home to the oldest known caves in the world.