Three kilometers past the crab statue on the Remedios road you'll find one of the nation's best potted histories of slave culture, the sugar industry, and pre-diesel locomotives. There's a video of Cuba's sugar industry, models of figures toiling to harvest the product and lots of original machinery, which, while appearing Industrial Revolution-esque to most Western eyes, was imperative in Cuba right up until Castro's clampdown on the industry in the 1990s.
An added bonus is the extensive collection of locomotives (the place is also known as the Museo de Vapor, or Museum of Steam), featuring Latin America's largest steam engine, and there are steam train rides daily.
