Parismina has no road access. The usual budget route is by bus to Caño Blanco, then a short water-taxi ride through the canals to the village. Times can change, so confirm the return connection before assuming you can arrive and leave on the same day.
Boats also pass along the canal route between Limón, Tortuguero, and other Caribbean coast stops, but they do not always stop in Parismina without prior arrangement. Charter flights are possible in theory, but most independent travelers arrive by boat.