San Juan, Puerto Rico, offers a blend of history, culture, and natural beauty. Old San Juan features colorful colonial architecture, historic forts like Castillo San Felipe del Morro and Castillo San Cristobal, and cobblestone streets perfect for exploration. Modern San Juan boasts vibrant nightlife, beaches like Condado and Isla Verde, and a variety of restaurants and shops. Accessibility varies; Old San Juan can be challenging for those with mobility issues due to uneven surfaces. Both solo and guided visits are rewarding, with guided tours offering historical context. The best time to visit is generally from mid-April to June to avoid peak crowds and the rainy season (August to November). Expect to spend around $150-$300 per day, depending on your travel style. A typical visit lasts 3-5 days to experience the main attractions.