Enjoyed this trip. Cruised around on the bus with an informative guide. Saw lots of hidden areas then winded our way up to the tunnels. The tunnels interesting but felt that more could be done with them and the guide was a bit repetitive.
The tour was very rushed, we were told to put on hard hats (which were of course necessary) the hats were very dirty, and the guide rushed ahead, at one point talking to herself before she realised that the mainly elderly tourists could not keep up with her especially in the dark tunnels with uneven flooring.