had a crackin mooch on an organised tour

seen the control room first hand and the huge fans that control the flow of air
then under the road surface to the tunnel itself
along some escape tunnels to see the cars flying past
also had a look at the service tunnels (central avenue)

well worth paying a visit to this place

a bit of history
http://www.tunnelusers.org.uk/history.htm

and about the tour
http://www.visitliverpool.com/site/t...l-tour-p199991


control room....





airlock door as you enter the chamber..

one of the motors that powers these big fans

and the fan in action...

looking up a fresh air shaft....

one of many escape tunnels...

a little section where you could look through the old dock to the foundations of the cunard building

going under the road surface to the access tunnels

access tunnels....





central avenue....