The Fortaleza de Sao Sebastiao, located on Ilha de Moçambique, is a UNESCO World Heritage site and one of the oldest European fortresses in sub-Saharan Africa. A visit typically takes 2-3 hours, allowing ample time to explore its historical architecture, including the Chapel of Nossa Senhora de Baluarte. Accessibility can be challenging due to uneven surfaces and limited facilities, so those with mobility issues may require assistance. Solo exploration is possible, though a guided tour can enrich the experience with detailed historical context. Seasonal restrictions are minimal, but the dry season (May to October) offers more pleasant weather for visiting. Costs are relatively low, primarily covering entrance fees and transportation to the island. As a remote location, it's wise to plan transportation in advance.