The Castle of the Three Kings of Morro, or El Morro, is a historic fortress guarding the entrance to Havana Bay. It offers stunning panoramic views of the city and the ocean. Accessibility can be challenging due to uneven surfaces and stairs, so it may not be suitable for individuals with mobility issues. Exploring independently allows for flexibility, but a guided tour provides valuable historical context and insights. The castle is open year-round, but the summer months (June-August) can be very hot and humid. Entrance fees are approximately $10-$15 USD. A typical visit lasts between 1.5 to 3 hours, depending on your level of interest and exploration.