Cathedral cove was a little bit of a walk - about 45 min each way. The walk there was beautiful with birds and flowers and a beautiful view of the coast. There were a few benches along the way to rest if you wanted.
Along the way there were little side tracks for Gemstone Bay, Mares Leg Cove, and Stingray Bay. Some of these had some fairly steep steps/track to reach.
At the end, Cathedral Cove itself - it was really a beautiful place. The trail came down some steps and opened out onto a wide flat beach, and to your left is the amazing cathedral archway. On the way back, we took the alternate path through the woods and saw neat rocks and had some shade. I would recommend trying one path one direction and choosing the other path on the way back.
TIPS: Wear sensible shoes and bring sunscreen and a hat - there's not much shade on this path!