the tunnels were built in 1957 but did not open till 1963
The length of each tunnel from start to finish is 762 metres (2,500 feet)
The twin tunnels are built in cast iron to an internal diameter of nine metres (29 feet) and each has a roadway of seven metres (22 feet) wide,
as you walk through the tunnels you feel someone is watching you ,some of the tunnels are dark and
Eerie we did pickup some light anomalies on several pictures taken would be a good location for a investigation.