In fact rather stupidly in retrospect I presumed that going to Havana and the beach resort of Varadero meant I wouldn't see any railways at all, so doing any research in advance would be pointless.
Post event I discovered this site which has proved to be very useful in making sense of what I saw.
So where do I start? well the San Jose Craft Market by the harbour is where I got my first shock. I believe up until 2011 tourist trains ran here. As it is there were several static locos on display of both standard and narrow gauge.
More photos are here though I've scattered them, through the text where I can.
To be honest I didn't have time to absorb everything I was seeing, especially since American loco design is a very peripheral interest .
I had quite a shock on the Sunday when wandering though the middle of Havana, literally a few hundred feet from our hotel, I suddenly came across what I believe is the main restoration centre for steam locos.
An excursion in a 1958 Studebaker gave me the only glimpse I got of the Hershey Railway
but also alerted me to the locos preserved around Havana's Central Station
Parque de los Agrimensores
And finally we stumbled over this coach.
Part 2 - The Sugar Mill