Ilhabela is an oceanfront escape where Atlantic Forest mountains drop straight into the Sao Sebastiao Channel, creating a rare mix of shipwreck dives, protected snorkel spots, and jungle waterfall days in one compact trip. Scuba is mostly boat diving to reefs, small caves, and a surprising wreck collection, from shallow training hulks like Aymore to deeper targets like Velasquez, Theresina, and the storied Principe de Asturias. The signature site is Ilha das Cabras, a municipal submarine ecological sanctuary with easy depths and reliable fish life for divers and snorkelers. Plan around summer crowds and rain, watch for shifting visibility, and expect a trip that feels like a blend of coastal adventure and rainforest retreat.