The first European settlement in Puerto Rico, Caparra, was founded in 1508 by Juan Ponce de León in land that is today part of Guaynabo. Ponce de León resided there as first Spanish governor of Puerto Rico. This settlement was abandoned in 1521 in favor of San Juan. The ruins of Caparra remain and are a U.S. National Historic Landmark. The Museum of the Conquest and Colonization of Puerto Rico, which features artifacts from the site and others in Puerto Rico, is located on the grounds.