Tunnel location
The tunnel can be found at the head of the Rhondda Fawr in the village of Blaencwm and at the head of the Afan Valley in the village of Blaengwynfi.
The tunnel can be found at the head of the Rhondda Fawr in the village of Blaencwm and at the head of the Afan Valley in the village of Blaengwynfi.