Borneo is the richest rainforest island of all; home to 60,000 species of plants and animals. But this 'paradise' is an illusion; the lush forest is effectively growing on a desert.

The Namib Desert is one of the oldest in the world, having given rise to more indigenous species than any other. With 50-degree temperatures and annual rainfall that is measured in millimetres, this enthralling travel documentary narrated by Helena Bonham Carter asks, how is this possible? Strange and marvellous desert specialists share this unexpected Eden including lions, elephants and giraffes.

In Africa's Great Rift Valley, there’s a 'land that time forgot', the rolling grasslands of the Luangwa Valley. Helena Bonham Carter narrates this engrossing travel documentary which ventures through the seasons, discovering the secret to this Eden's great riches. This remarkable savannah is home to Africa’s most iconic animals: elephants, rhino, giraffe and some that are unique to the region.

Only the hardiest pioneers, tossed by storms and strong currents, could reach this otherworldly outpost. But, as this travel documentary narrated by Helena Bonham Carter discovers, once on Galapagos they found an unspoilt land of endless possibilities. Now, the islands are home to almost 2,000 unique species, making it one of the most important areas of biodiversity in the world.

Patagonia, at the far tip of South America is known as 'the end of the world'. It feels like a land frozen in time. Voyaging from the high Andes to coastal fjords, this Helena Bonham Carter narrated travel documentary discovers that to survive here you have to be as extreme as the country itself, whether that means specializing in one habitat or being tough enough to live in them all.

[Season Finale] In southeast Alaska, there's an ice-bound Eden that harbours possibly the richest temperate rainforests of all.