Kerry Walker takes a road trip through Bannau Brycheiniog National Park

For a walk which visits quiet hills and explores post-industrial dereliction, Eryri ’s Moelwyns are second to none.

NEWCASTLE AND MARDU CIRCULAR Level Easy Elevation gain 217m Length 6.1km (1hr 49min) Description This round-the-hill loop trail from Newcastle leads through peaceful rural landscapes and small village

■ Distance: 8½ miles/13.7km ■ Time: 5 hours ■ Grade: Challenging

■ Distance: 9¼ miles/14.8km ■ Time: 4 hours ■ Grade: Moderate

Jim Perrin revisits a minor but notable hill of the Rhinogydd, in the fine company of campaigning photographer Fay Godwin and archaeologist Peter Crew