The castle crypt
There is no particular route for this area. You can walk around and explore the remains of the castle and the quarries below. There is an old roman road that you can walk along at the foot of the quarries, with some fantastic views and interesting shaped landscape. Parking can be difficult, as the nature reserve carpark is now closed and the barrier is down. I park at the junction of Goitre Lane, Pontsarn and cross the road to the gated entrance of the field. Its then straight up around the edge of the quarry to the fence of Morlais Castle golf course and the moat of the castle. You can also turn left when you get to the gate as an alternative, and walk the roman road along the foot of the quarries first. You can then ascend to the top further along to get to the crypt of the castle.
The maps below show the route I took to the top, and general area.
Morlais Castle is a 13th century castle built by Gilbert de Clare, 3rd Earl of Gloucester. The castle is believed to have never been completed.
Views on top of the crypt
The surrounding quarry
You maybe lucky and even see the Brecon Railway steam train