You can take time to visit Puck's Glenn during your travels to Dunoon. While you're in the area, stroll along the marina.
Explore the great outdoors at Benmore Botanic Garden, a lovely green space in Benmore. While you're in the area, wander around the natural setting.
You can spend an afternoon browsing the exhibits at Castle House Museum in Dunoon. While you're in the area, wander around the gardens.