The tunnel on Wrysgan incline
The small mine here is above Cwmorthin and Tan y Grisiau on the Ffestiniog Railway. If approaching Blaenau Ffestiniog from Porthmadog the spectacular incline can be seen on the left side. The bottom of the incline has been cut by the road to the pump storage reservoir but the upper stretch is seen to disappear into a tunnel. The climb through the tunnel is quite scary and the last few yards require a short climb over a rocky outcrop - not sure how the rails negotated this?