Castillo San Cristobal, a historic Spanish fort in San Juan, Puerto Rico, offers stunning ocean views and a glimpse into the island's colonial past. The fort is partially wheelchair accessible, with ramps and elevators available in some areas. Exploring independently is easy with informational signs, but guided tours provide deeper historical context. Expect to spend 2-3 hours touring the grounds. There are no significant seasonal restrictions, but note that the fort can get crowded, especially during peak tourist season (winter). Entrance fees are typically around $10 per adult, and free for children under 15. The site includes steep ramps, stairs, and uneven surfaces that may present challenges for those with mobility issues.