The world's most dangerous locations are home to some of the greatest natural wonders, stunning landscapes and extraordinary creatures. Using the latest modern technology and extreme climbing techniques, our crack daredevil team are embarking on a mission to unlock some of the Earth's last secrets. In Lost Worlds, natural historian and adventurer Monty Halls teams up with explorer, survival expert and pioneering climber Leo Houlding. Leo's extreme climbing experience coupled with Monty's incredible adventurer skills and scientific knowledge make them the perfect team to reach these dramatic areas and document these natural wonders. Ex-royal marine-turned-biologist Monty Halls and world-class climber Leo Houlding embark on daredevil adventures in lost landscapes, documenting these natural wonders.