In message , Roland Perry
writes

I'm trying to compile a list of interesting things to go see on the
"tube" on a day trip. Engineering mainly, like the crossover at the end
of the Oxford St Bakerloo, the scale of Canary Wharf and the tunnel out
of Bank-DLR. What others can the team suggest?

Baker Street for a quite effective reconstruction of the look and feel
(if not the smell) of the original Metropolitan line station at platform
level - Gloucester Road, too, where you can also see the Platform for
Art. Can your itinerary include a stop off at Covent Garden for the LT
museum?

--
Paul Terry