• Soldiers marching to the entrance of Castillo San Felipe del Morro

    San Juan

    National Historic Site Puerto Rico

For Teachers

Fortifications of Old San Juan: Guardians of the Caribbean (Teaching with Historic Places)Discover how Spanish fortifications on the island of Puerto Rico helped protect Spain's expanding interests in the New World.

La versión en español Los Castillos del Viejo San Juan: Guardianes del Caribe

Did You Know?


San Juan National Historic Site is one of only 20 National Parks included in the World Heritage List of the UNESCO.