San Juan is the capital and largest city of Puerto Rico, a U.S. territory located in the Caribbean. It is known for its vibrant culture, rich history, and stunning architecture, making it a popular tourist destination.

One of the main attractions in San Juan is Old San Juan, a historic neighborhood that features cobblestone streets, colonial-style buildings, and forts such as Castillo San Felipe del Morro and Castillo San Cristobal. The historic district is also home to numerous museums, art galleries, and shops selling local crafts.

Another popular attraction in San Juan is the San Juan National Historic Site, which encompasses several historic forts and defensive walls, as well as the historic city gates. Visitors can tour the forts and learn about the city's rich military history, or simply enjoy the scenic views from the walls.

For beach-goers, San Juan offers several options, including Ocean Park Beach and Isla Verde Beach. The beaches offer a variety of water sports, such as surfing and snorkeling, and are surrounded by restaurants and bars where visitors can enjoy a meal or drinks.

San Juan is also home to several cultural institutions, including the Museum of Art of Puerto Rico and the Ballet de San Juan. The city also boasts a thriving nightlife scene, with plenty of bars, clubs, and music venues to keep visitors entertained into the night.