Mahler's 1st.
It was meant to be a musical parody lampooning all the pompousness of the age, but it is great, especially the last movement.
I first came across it as it was the background music to the film 'Diamond Were Forever' (circa 1987), a film about the North British Loco works in Glasgow (Springburn), and there is quite the most fantastic sequence at the end filmed from the air with some steam locos all 'racing' each other in Australia, including the NBL built 'City Of Melbourne', and it plays the last 3.10 or so minutes of it, it but I cannot find it on Youtube, because, of course, all that comes up are films for Diamonds Are Forever, some sort of spy film I am led to believe, but if you can find it, WATCH IT!!
The 'Diamonds Were Forever' title refers to the diamond shaped builder's plates NBL locos had and it mainly covers the locos sent for export, including those sent to Paraguay, South Africa and Australia, loaded onto the boats in Glasgow by the Iconic Finneston Crane. The locos were driven through the streets to the boats and it must have been quite some spectacle!!