Laguna de Rocha is the protected lagoon south of the city, where freshwater wetlands, pasture, sandbar, and Atlantic surf meet. It is one of the best birding areas in eastern Uruguay, with flamingos, swans, shorebirds, and raptors depending on the season.
The lagoon is not a manicured park. Access points are rural and conditions vary with weather and water levels, which is part of the appeal. Go with binoculars, patience, and enough daylight to find your way back; a car makes the outing far easier from Rocha.