In this opening episode we're in Cornwall and Devon, two counties attracting millions of hikers, holidaymakers and surfers every year. Julia Bradbury heads off on one of the nation's best-loved walking trails, the rugged South West Coastal Path. Robson Green takes to the skies for a bird's eye view of Cornwall's St Agnes heritage coast. On the historic St Michael's Mount, Ben Fogle experiences gardening at a whole new level, and Liz Bonnin gets up close to some amazing wildlife in the waters off Devon's Lundy Island.