San Juan is the capital of and largest city in Puerto Rico, with a population of about 395,000. It has one of the best harbors in the Caribbean. The city celebrates its fifth century in 2008 or 2021, depending on whether one counts from the founding of the original settlement at Caparra or the act of moving the Caparra settlement to Puerto Rico isle (now Old San Juan).
San Juan is the oldest city under the jurisdiction of the United States. San Juan is in the northeast of the island of Puerto Rico, and features distinctly century-old architecture, such as Spanish military forts built from the 1540s to 1800s, an active harbor, and a very active economic area in the Hato Rey district. It features magnificent beaches, hotels, plazas, historic sites, museums, and so on. San Juan has a land area of about 76 square miles. The city's population is approx. 395,000.