In the heart of the Black Mountains, the Penn ar Pont circuit will take you to Nantes-Brest canal, an integral part of Brittany’s history. You’ll notice the remains of a slate quarry, whose tunnels are now home to some of the largest bats in Brittany, the Greater Horseshoe Bat. You’ll pass two locks before leaving the tow path and heading in to the countryside around Châteauneuf, with its woodlands and streams. The path then joins up with another trail ‘In the footsteps of Paul Sérusier’, which is dedicated to the painter who lived in Châteauneuf du Faou. You’ll cross a street named after him and discover this painter’s ’green valley’.