Here's a bit of irony for you. The fight for Santa Clara proved to be the final decisive battle of Fidel Castro's revolutionary war against the Batista regime in Cuba. The decisive moment of the decisive battle took place here, as a group of rebels under Che Guevara's command derailed a train carrying government reinforcements.
The communists lifted the tracks with this very bulldozer, which was made by the rather capitalist Caterpillar Inc of the US. They still leave it on show though, on a concrete plinth along with other mementoes of the battle. Maybe everyone who visits is too polite to mention how odd this is. Perhaps the bigger surprise is that, unlike all the other 1950s American vehicles still going strong around Cuba, the bulldozer isn't still being pressed into service.
Guevara's mausoleum, established following his later death in Bolivia, is elsewhere in the city.