For something completely different in Varadero's tourist circus, decamp to this large cave 500m beyond the Club Amigo Varadero on the Autopista Sur. It's known for its 47 pre-Columbian drawings, discovered in a recess in 1961 and thought to be around 2000 years old. The black-and-red drawings feature the same concentric circles seen in similar paintings on the Isla de la Juventud, perhaps a form of solar calendar. You'll be given a torch at the entrance and told to mind the bats!
Self-guided visits take around 30 minutes.