When he landed on a small Caribbean island in 1493, Christopher Columbus referred to it as puerto rico (Spanish for "rich port"). Today, the name Puerto Rico refers to an archipelago that includes the main island (Puerto Rico) as well as several smaller islands (including Vieques and Culebra). Puerto Rico is the fourth-largest island in the Caribbean, lying approximately 1,000 miles (1,600 km) southeast of Florida. Puerto Rico was a Spanish colony...