The naturalist visits uncharted territory in pursuit of new discoveries. He takes on physical challenges and encounters extraordinary wildlife.

Steve leads an expedition in the Jebel Akhdar mountain range of Oman. With temperatures soaring, dehydration and heat stroke are a constant threat.

Steve heads to the Himalayas to visit the last unexplored river in Bhutan. Legend has it that at some point, the river drops off the face of the planet.

Steve and his team are venturing into the heart of Suriname, to kayak an unnamed river that will take the them through a forest unchanged for millions of years.

Steve and an elite team of rock climbers head to the desert of southern Oman to attempt the first ascent of a towering escarpment.

The team battle through the jungle into the heart of Indonesian Borneo, to caves holding secrets that could rewrite history.

Steve and his team of explorers head to Greenland in the Arctic. Kayaking the world's largest fjord, they dodge giant icebergs and hungry polar bears.

Steve heads into Yucatan, Mexico, on the trail of the ancient Maya. Uncovering secrets and artefacts, they push far into the underworld of the Maya.

Steve leads a team on a mission to climb a remote mountain in the Stauning Alps of Greenland, crossing a vast river and skiing across a glacier.

Steve leads a team into the largest unexplored cave network on Earth. Below the jungles of Mexico, they push further and deeper than anyone has gone before.