What is the most famous American island in the Caribbean?

The most famous American island in the Caribbean is Puerto Rico. As an unincorporated territory of the United States, Puerto Rico has a unique political status. The island is known for its beautiful beaches, vibrant culture, and historic landmarks such as El Morro, a 16th-century fortress in San Juan. Puerto Rico is also famous for its rich history, which includes indigenous Taino influences, Spanish colonialism, and a blend of African, European, and American cultures. The island is a popular tourist destination, offering a mix of natural beauty, adventure, and cultural experiences.