From the museum, head straight (south) on Martí past Parque Guaicanamar, and turn left on Albuquerque and right on 24 de Febrero, the road to Guanabacoa. About 1.5km from the ferry you'll see a high metal stairway that gives access to Colina Lenin, one of two monuments in Havana to Vladimir Ilyich Ulyanov (better known to his friends and enemies as Lenin).
The monument was conceived in 1924 by the socialist mayor of Regla, Antonio Bosch, to honor Lenin's death (in the same year). Above a monolithic image of the man is an olive tree planted by Bosch, surrounded by seven lithe figures. There are fine harbor views from the hilltop.
