I went on a visit there many many years ago
Well worthy of a visit.
Two areas stuck out in my mind as places you don't want to dwell too long in:-
(1) The difficulty of breathing whilst in the Battery Room.
(2) The Contactor Room. Trains were not "driven": full power was either applied to a vehicle, or not, in order for it to move or stop. The explosive arcing coming from contactors that controlled the trains were within feet of where we were standing was both deafening and blinding.
I'm sure that these two facets will be made less "in yer face" to comply with H&S.