Catamaranes Interisleña offers boat tours of the Paraná River Delta. Forty-minute river trips navigate the Tigre, Lujan and Sarmiento rivers and take in the main sites in Tigre. One-hour boat tours follow the same rivers to the Sarmiento Museum and, in addition to city sights, offer a glimpse of nature. Two-hour river cruises combine natural and city sights and also offer a distant view of Buenos Aires. Family Travel Tips: All tours depart daily. Not all depart from the same pier. Inquire when booking. Children under 8 are free of charge.