In Old Havana, a UNESCO world heritage site, the past is palpable. Rumba riffs roll through quaint cobbled squares; vintage cars ply the streets; and historic. Old Havana and its Fortification System. Havana was founded in by the Spanish. By the 17th century, it had become one of the Caribbean's main centres. Old Havana (Spanish: La Habana Vieja) describes the central area of the original city of Havana, Cuba. Havana is a city of great architectural.