The San Juan National Historic Site, encompassing the iconic forts of El Morro and San Cristóbal, offers an immersive journey into Puerto Rico's colonial past. While generally accessible, visitors should be prepared for uneven cobblestones, numerous stairs, and ramps within the historic structures, making comfortable footwear essential; full wheelchair access to all levels may be limited. Both solo exploration, facilitated by informational placards, and engaging ranger-led or audio tours are highly recommended for a deeper understanding. The site is open year-round, with no seasonal restrictions, though summer heat and humidity, along with hurricane season (June-November), are factors to consider. A combined entrance fee, typically around $10-$15 per adult, grants access to both major forts, and a thorough visit usually requires 3-4 hours, though a full day can easily be spent exploring and enjoying the panoramic ocean views. Remember to bring water, sunscreen, and a hat due to the strong Caribbean sun, and consider public transportation or ride-sharing due to limited parking in Old San Juan.