Wales' favourite weatherman, Derek Brockway, visits Usk, winner of the Wales in Bloom gold award an amazing 30 times. His walk is a stunning 10-mile circular walk which starts and ends at Usk Castle. On the walk he sees the landscape from above as he hitches a ride in a glider; learns about an ancient orchard; visits some community allotments and helps local youngsters plant sunflowers. Archaeologist Dr Erin Lloyd Jones finds out what the Romans did for Wales and Matthew Bassett explores decorative Oriental-inspired tinware once made in the town.