Puerto Rico is a Caribbean island between the Caribbean Sea and North Atlantic Ocean, about 3 times the size of Rhode Island. It has a tropical climate and mountainous terrain with many beaches. Puerto Rico is a self-governing commonwealth of the United States and uses the U.S. dollar. The culture is influenced by both Spanish and American traditions, and baseball is very popular. Tourism is an important industry, with attractions including beaches, historic sites, and El Yunque National Forest.