You'll want to browse the collections at Nautical Museum of Ilhabela, Sacred Art Museum, and Fundação Mar. While you're exploring, swing by Fazenda Santana Historical Center, Casa Esperanca Historical Place, and Matriz Church to learn a bit about the area. Local parks like Agua Branca Waterfall, Toca Waterfall, and Sao Sebastiao Peak are peaceful spots to stop and take in some fresh air.