A NETWORK of abandoned underground tunnels have been transformed and reopened to the public.
The Tregarth Railway Tunnels in Wales were once part of a passenger railway line.
Disused Railway Tunnels UKA network of abandoned underground tunnels have been transformed and reopened[/caption] Disused Railway Tunnels UKThe Tregarth Railway Tunnels in Wales were once part of a passenger railway line[/caption]And they have now been opened up to a new generation of travellers.