A defen­sive struc­ture built in the mid-17th cen­tu­ry to pro­tect the bay of the city of San­ti­a­go de Cuba. The best pre­served exam­ple of Span­ish colo­nial mil­i­tary archi­tec­ture. Cur­rent­ly, the fortress hous­es a muse­um of the his­to­ry of pira­cy.