Puerto Rico is a large Caribbean island of roughly 3,500 square miles located in the West Indies. It’s the easternmost island of the Greater Antilles chain, which also includes Cuba, Jamaica and Hispaniola (divided into Haiti and the Dominican Republic). After centuries of Spanish rule, Puerto Rico became a territory of the United States in 1898 and has been largely self-governing since the mid-20th century. It has a population of some 3.4 million people and a vibrant culture shaped by a mix of Spanish, United States and Afro-Caribbean influences.