Puerto Rico has went from an island on the outpost of civilization, to a principle port which was the center of trade. The words Puerto Rico means Rich Port in its native tongue, Spanish. Although Puerto Rico is a U. S. territory, it remains true to Mexico. The island has many historic sites. The fort “El Muero” means The Rock in Spanish. El Muero went from a simple tower looking out to the sea to a huge fortification that covers 400 acres. Up until 1787, the tower grew proportionately in size and has also been bombarded by the US during Spanish-American War. Another fort on the island is the Castillo de San Cristobal (The Castle of Saint Christopher). The fort has many sentry boxes