Things To Do In Puerto Rico San Juan National Historic Site San Juan National Historic Site, Puerto Rico Overview A series of fortifications built to defend San Jose and the Bay of San Jose, along with the La Fortaleza, the park is a UNESCO World Heritage Site. These fortifications were built between the 15th and 19th century, and are perhaps the most important feature of Puerto Rico's history. It became a protected park in 1949, and a World Heritage Site in 1983, 1 of only 12 in the United States. These defence structures display a great degree of versatility shown to adapt the strong character of the European military defence structures in accordance with the specific nature of the Caribbean coasts, and how these techniques developed over the centuries. International Travel Service in Vijay Nagar | International Service in Indore | Domestic Tour Service in Indore | Domestic Tour Planner in Indore | Domestic Travel Agents in Indore | Domestic Tour Operator in Vijay Nagar | Singapore VISA Service in Indore | Singapore VISA Service in Vijay Nagar | Malaysia VISA Service in Indore | Malaysia VISA Service in Vijay Nagar | Thailand VISA Service in Indore | Thailand VISA Service in Vijay Nagar | Dubai VISA Service in Indore | Dubai VISA Service in Vijay Nagar | UAE VISA Service in Indore | UAE VISA Service in Vijay Nagar | USA VISA Service in Indore |