In 99.9% of port of calls, cruise lines will offer a variety of excursions. Boca da Valeria is the rare .1%. No ship-sponsored tours are available. The primary activity is exploring the village on foot. If you dawdle, this takes less than an hour. Afterwards, you can grab a bite to eat with a beer at the only snack shack. You can wander through the forest along a primitive path. Or you can accept one of multiple solicitations for a boat tour.