The history of little-known places across the world, from Chile to Arizona, that offer natural beauty and native wildlife.
Iceland - Fire: The powers of fire and ice collide in Iceland, actually Earth's largest volcanic island. Take a journey to this country driven by the forces of nature. (S2, ep 1)
Iceland - Ice: Return to Iceland to see how its landscapes are changing through the retreat of its glaciers. Every year, their tremendous power alters the nation forever. (S2, ep 2)
This part of Canada's east coast is home to the world's highest tides. Beneath these waves lies an intricate maze of invertebrate life. (S2, ep 3)
The wild Welsh coastline is a geological treasure. Follow its winding trails through the world's largest continuous footpath - over 800 miles of incredible scenery. (S2, ep 4)
This is a land small in size but great in wonder. See some of its most impressive sights, including the Cliffs of Moher, shaped and reshaped by giant natural forces. (S2, ep 5)
The wettest place in North America, this is a primitive habitat where the Pacific Ocean holds the key to life, and where nature and the human spirit co-exist. (S2, ep 6)
The Sonoran Desert is a forgotten, foreboding place. With its towering volcanic peaks and almost other-worldly craters, its conditions push animal life to the limit. (S3, ep 3)
The rainforest meets the Caribbean in this eastern region of Mexico. Explore almost-impenetrable jungle and dive into the area's underwater caves. (S3, ep 1)
One region made up of many worlds - climb from the low hill of a semi-desert into the lush green clouds of a forest teeming with wildlife. (S3, ep 2)