The day follows the classic island itinerary — the shallow, warm sandbar of Goió, the corals and low tide pools of Pedra Furada, fresh fish lunch at Ilha do Sapinho, served on a wooden pier over the mangrove. The difference in this itinerary comes later: the water of the bay gives way to the fresh, colder water of Rio da Serra, and the landscape changes — closed mangroves on the banks, the sound of the waterfall growing before it even appears. The boat is positioned right under Cachoeira de Tremembé for a swim that none of the five islands offers, with the force of the water falling straight onto your shoulders. For those who do, a short trail — hired right there with a local guide, about 40 minutes of climbing — leads to higher natural pools, where the current creates the effect of a natural hydromassage between the rocks. Back in the bay, a quick trip to Ponta da Ilha Grande shows the region's largest community in the distance, and the day ends in Campinhos, with the deepest and darkest water of the five stops — the last dive before heading back to Barra Grande.