Puerto Rico is an autonomous territory of the U.S., and it is located in the Caribbean, east of the Dominican Republic. This small state covers only approximately 9.000 sq kilometers, being inhabited by almost 4.000.000 people. Its capital and largest municipality is San Juan (434,000), which, as expected, is the economical, cultural and touristic center of Puerto Rico. The official languages are Spanish and English, and the main ethnic groups are: White (Spanish) 76%, Black(7%), Mixed(12%), and the Asian and Amerindian minorities. The climate is a tropical maritime one, with average annual temperatures of 26 degrees Celsius.