I took the Tirano-St Moritz & return last Easter. The snow was still around and rather pretty.
On the Tirano - Chur train try to get a seat in a carriage that has the "large" slide down window openings. These may be the slightly older carriages, though still quite comfortable. The carriages have interior lights - even during the day - which can give a reflection in the window glass & spoil your photos. Try to get near the front or rear of the train as the tight curves can give a great photo of the train in the picture. I spent most of the run with my camera lens poking out the window. Some amazing photos.
Heading back to Italy for round 2 in the middle of August. Still lots to tick off the list, but back to Firenze for the markets for sure.
BTW
Marvellous TR JessicaTam.
The Man in Seat 61 is an absolute gold mine for pointers.