The Baía da Babitonga is the wide, mangrove-lined bay at the mouth of the Cachoeira River, a few kilometres east of central Joinville. The bay is home to a resident population of Guiana dolphins, an extensive system of mangrove channels, and a handful of small islands.
Boat trips run from the village of São Francisco do Sul and from the Vila da Glória pier on the Joinville side. Half-day tours combine dolphin watching with a stop at one of the islands and a short walk through the mangroves. Morning departures are more reliable for dolphin sightings.