Derek the weatherman reflects on some of his favourite walks from south Wales. In the Vale of Glamorgan, Derek is joined by Olympian Colin Jackson, and together they explore a five-mile coastal route that has it all - dinosaur footprints, World War II gun battery remains, the site of a major communication breakthrough and an iconic Victorian pier. In his second hand-picked wander, Derek walks from Port Talbot to Swansea and discovers a walk full of contrasts. Amongst the heavy industrial landscape lie some surprising pockets of nature and a bustling marina. Derek also tries his hand at the helm of a luxury boat and narrowly avoids crashing into the harbour wall. Finally, Derek revisits Usk, where he comes across something unexpected - an airfield. Home of the South Wales Gliding Club, which has been in operation for 60 years, Derek joins them for a weather briefing before taking to the skies himself, where he witnesses amazing views of Usk and the Bristol Channel.