سان خوان, or San Juan, is the capital city of Puerto Rico, located on the island's northeastern coast. It is known for its rich history, vibrant culture, and beautiful beaches. Founded in 1521, it is one of the oldest cities in the Americas and features historic sites like El Morro, a 16th-century fortress. The city is also a hub for tourism, offering a mix of modern amenities and colonial architecture. Visitors can explore the colorful streets of Old San Juan, enjoy local cuisine, and participate in various festivals that celebrate Puerto Rican heritage and traditions.