Buenos Aires Boats offers a different view of Buenos Aires. The boat tours, one 45 minutes the other 90, take in the main sights of the city. The shorter 45-minute tours follow the Canal Sur to Rio de la Plata. Ninety-minute boat trips also cruise the Darsena Sur. Family Travel Tips: Boat Tours depart daily from Pedro de Mendoza 1900, known as Vuelta de Rocha. The pier is located at the base of Caminito Street in the La Boca district. A reduced rate is available for children aged 3 - 12. Children under 3 are free of charge.